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CIS 336 Final Exam
Question 1. 1. (TCO 1) A DBMS performs several important functions that guarantee the integrity and consistency of the data in the database. Which of the following is NOT one of those functions?
Question 2. 2. (TCO 1) A relational DBMS provides protection of the _____ through security, control, and recovery facilities.
1. CIS 336 Final Exam (August, 2019)
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CIS 336 Final Exam
Question 1. 1. (TCO 1) A DBMS performs several important
functions that guarantee the integrity and consistency of the data in
the database. Which of the following is NOT one of those functions?
Question 2. 2. (TCO 1) A relational DBMS provides protection of the
_____ through security, control, and recovery facilities.
Question 3. 3. (TCO 2) A relationship is an association between
_____
Question 4. 4. (TCO 2) A _____ key is a key that is composed of
more than one attribute.
Question 5. 5. (TCO 3) The PK must uniquely identify each entity
instance. A primary key must be able to guarantee unique values. It
cannot contain nulls. This rationale belongs to _____
Question 6. 6. (TCO 3) The extended entity relationship model
(EERM) is sometimes referred to as the _____
Question 7. 7. (TCO 3) A table that has all key attributes defined, has
no repeating groups, and all its attributes are dependent on the
primary key, is said to be in _____
2. Question 8. 8. (TCO 4) When a constraint is created at the _____
level with the CREATE TABLE command, the constraint definition
is simply included as part of the column definition. (Points : 4)
Question 1. 1. (TCO 4) When creating a table, which of the following
statements is NOT correct?
Question 2. 2. (TCO 4) Which of the following SQL statements
would you use to create a table named DEVRY?
Question 3. 3. (TCO 5) The Crow's Foot model is more _____-
oriented than the Chen model.
Question 4. 4. (TCO 5) Knowing the _____ number of entity
occurrences is very helpful at the application software level.
Question 5. 5. (TCO 6) The _____ statement can be used to enable or
disable a constraint.
Question 6. 6. (TCO 6) When modifying the data characteristics of a
column in Oracle, which of the following is correct?
Question 7. 7. (TCO 6) Which of the following keywords can be used
to change the size, datatype, or default value of an existing column?
Question 8. 8. (TCO 7) Any type of subquery can be used in the
_____ clause of a SELECT statement
Question 1. 1. (TCO 7) Which of the following subqueries returns
more than one row of results to the outer query?
Question 2. 2. (TCO 7) To list a unique value, where the list will
produce only a list of those values that are different from one another,
you will write the command _____
3. Question 3. 3. (TCO 8) Based upon the contents of the
BOOK_ORDER table shown below, which of the following SQL
statements will display the ship date for order 1006 as April 2, 2002?
Question 4. 4. (TCO 8) Which of the following format elements will
display insignificant leading zeros?
Question 5. 5. (TCO 8) Which of the following functions determines
the number of characters in a character string?
Question 6. 6. (TCO 9) The column to be updated by the UPDATE
command is specified in the _____ clause.
Question 7. 7. (TCO 9) Using the promotion table shown below,
which of the following SQL statements will insert a new row into the
PROMOTION table?
Question 8. 8. (TCO 10) Which of the following commands is used to
establish a user account?
Question 9. 9. (TCO 10) Which command will delete a user account
from Oracle9i?
Question 1. 1. (TCO 2) Explain what physical independence means.
Question 2. 2. (TCO 3) What is a composite primary key and in what
situation are they most commonly used? Give an example.
Question 3. 3. (TCO 7) Sally needs to find all employees who have a
date of hire between 01-JAN-2003 and 01-JAN-2005. She writes and
executes the following query.
Question 4. 4. (TCO 8) In a table named ORDER, there is a column
named SHIPDATE that contains a date for each order that has been
shipped. Write the query that would show the number of orders that
4. have been shipped. List the column name as Number of Orders
Shipped for this derived column.
Question 5. 5. (TCO 6) Write the SQL statement that will remove the
database table EMPLOYEE.
Question 1. 1. (TCO 7) Write a join query that for every order placed
on September 5, 1998, (use '05-SEP-1998') will list the order number
and order date along with the customer number, last name, and first
name of the customer who placed the order.
Question 2. 2. (TCO 8) Write a query that will list the part number,
part description, and on-hand value (units on hand * unit price) for
each part in item class AP. Give the expression an alias of on-hand
value.
Question 3. 3. (TCO 8) Write a subquery that will list the part
number, part description, and units on hand of all parts where the
number of units on hand is greater than the average of units on hand
for all parts.
Question 4. 4. (TCO 7) Using the orders table, write a query that will
list the order number, date, and customer number for every order that
was made prior to September 5, 1998. Format the date in your result
set to be in the same format as above (i.e., September 5, 1998).
Question 5. 5. (TCO 7) Using a NATURAL JOIN method, write a
query that will list the customer number, last name, and first name for
every customer who currently has an order on file for an iron.
===============================================
CIS 336 Final Exam 1
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5. 1. (TCO 1) Most DBMS are referred to as _____________database
management systems. (Points : 4)
elemental
linked
hierarchical
relational
2. (TCO 1) Data constitutes the building blocks of _____________.
(Points : 4)
information
processing
applications
programming
3. (TCO 2) If a foreign key contains either matching values or nulls,
the table(s) that make use of such a foreign key is/are said to exhibit
__________ integrity. (Points : 4)
referential
restrictive
secondary
redundant
4. (TCO 2) In a "one-to-many" relationship, which constraint is
usually added to the "many" table?
(Points : 4)
UNIQUE
6. PRIMARY KEY
FOREIGN KEY
NOT NULL
5. (TCO 3) A ____ occurs when a relationship is improperly or
incompletely identified and, therefore, is represented in a way that is
not consistent with the real world. (Points : 4)
surrogate primary keys
time-variant data
design trap
fan trap
6. (TCO 3) All of the following are true about a prime attribute
except_____________. (Points : 4)
it is a key attribute
it is at least part of a key
it is not a key attribute
it may be part of a composite key
7. (TCO 3) The conflicts between design efficiency, information
requirements, and processing speed are often resolved
through_____________.(Points : 4)
conversion from 1NF to 2NF
conversion from 2NF to 3NF
compromises that include denormalization
conversion from 3NF to 4NF
7. 8. (TCO 4) When a constraint is created at the ______ level with the
CREATE TABLE command, the constraint definition is simply
included as part of the column definition.(Points : 4)
table
column
database
row
Page 2 - Multiple Choice
1. (TCO 4) In Oracle, the CONSTRAINT clause is used to
___________________.(Points : 4)
create only referential constraints
define and name any constraint
create a short cut so the constraint does not have to be named
create only entity entegrity constraints
2. (TCO 4) The SQL command that lets you list the table contents is
(Points : 4)
insert.
select.
commit.
update.
rollback.
3. (TCO 5) The Crow's Foot model is more ___________-oriented
than the Chen model. (Points : 4)
object
8. user
implementation
processor
4. (TCO 5) The ___________ model is both software and hardware
dependent. (Points : 4)
conceptual
logical
condensed
physical
5. (TCO 6) Which of the following commands will add a new column
named FIRSTORDERDATE to the CUSTOMERS table to store the
date that the customer first placed an order with the company? (Points
: 4)
CREATE COLUMN firstorderdate, DATE TO customers;
ALTER TABLE customers ADD COLUMN firstorderdate DATE;
ALTER TABLE customers ADD firstorderdate DATE;
ALTER TABLE customers ADD (firstorderdate DATE);
6. (TCO 6) When modifying the data characteristics of a column in
Oracle, which of the following is correct? (Points : 4)
The column size can be increased.
The size of the column can be decreased.
Changing the default value of a column will change the values of data
already in a table.
9. If a NUMBER column is empty, its precision and scale cannot be
changed.
7. (TCO 6) Which of the followig SQL commands would alter the
table DEVRY and add a foreign key that references the CITY table?
(Points : 4)
ALTER table DEVRY
ADD CONSTRAINT devry_studentcity_fk references city;
ALTER table DEVRY
ADD CONSTRAINT devry_studentcity_fk FOREIGN KEY
references city;
ALTER table DEVRY
ADD CONSTRAINT devry_studentcity_fk FOREIGN KEY
(student_city) references city;
ALTER table DEVRY
ADD CONSTRAINT FOREIGN KEY (student_city) references city;
8. (TCO 7) Given a table named EMPLOYEE, the SQL command to
sort records in a specific order would be: (Points : 4)
SELECT EMP_LNAME, EMP_FNAME, EMP_INITIAL,
EMP_AREACODE, EMP_PHONE
FROM EMPLOYEE
LIST BY EMP_LNAME, EMP_FNAME, EMP_INITIAL;
SELECT EMP_LNAME, EMP_FNAME, EMP_INITIAL,
EMP_AREACODE, EMP_PHONE
FROM EMPLOYEE
ORDER BY EMP_LNAME, EMP_FNAME, EMP_INITIAL;
10. SELECT EMP_LNAME, EMP_FNAME, EMP_INITIAL,
EMP_AREACODE, EMP_PHONE
FROM EMPLOYEE
DISPLAY BY EMP_LNAME, EMP_FNAME, EMP_INITIAL;
SELECT EMP_LNAME, EMP_FNAME, EMP_INITIAL,
EMP_AREACODE, EMP_PHONE
FROM EMPLOYEE
SEQUENCE BY EMP_LNAME, EMP_FNAME, EMP_INITIAL;
Page 3 - Multiple Choice
1. (TCO 7) Which of the following subqueries returns more than one
row of results to the outer query? (Points : 4)
multiple-column subquery
single-row subquery
multiple-row subquery
correlated subquery
2. (TCO 7) Which of the following keywords can be used to join two
tables that do not contain a commonly named and defined column?
(Points : 4)
NATURAL JOIN
JOIN...ON
JOIN...USING
JOIN...WHERE
11. 3. (TCO 8) Based upon the contents of the BOOKS table shown
below, which of the following SQL statements will return the number
of categories contained in the table?
(Points : 4)
SELECT COUNT(DISTINCT category) FROM books;
SELECT DISTINCT COUNT(category) FROM books;
SELECT DISTINCT (COUNT(category)) FROM books;
SELECT DISTINCT COUNT(category) FROM books;
4. (TCO 8) The _____________ function can be used to display
upper-case characters in lower-case. (Points : 4)
CONVERT
MIN
LESS
LOWER
5. (TCO 8) Which of the following statements will produce the value
21.1? (Points : 4)
SELECT ROUND(21.12, 1) FROM dual;
SELECT ROUND(21.12, -1) FROM dual;
SELECT ROUND(21.12, 0) FROM dual;
SELECT ROUND(21.12, 0+) FROM dual;
6. (TCO 9) The column to be updated by the UPDATE command is
specified in the ______ clause. (Points : 4)
UPDATE
SET
12. WHERE
COL
7. (TCO 9) If the INSERT INTO command is used to insert data
values that violate an existing constraint in a table, which of the
following will happen. (Points : 4)
Oracle will raise an error and you will have to go update the incorrect
data.
Oracle will raise an error and the entire row will be rejected.
Oracle will raise an error and the invalid piece of data will be
rejected.
Oracle will raise and error and all current transactions will be rolled
back.
8. (TCO 10) Which of the following commands is used to establish a
user account? (Points : 4)
CREATE NEW USER username
IDENTIFIED BY password;
CREATE USERNAME username
IDENTITY password;
CREATE USER username PASSWORD password;
CREATE USER username IDENTIFIED BY password;
9. (TCO 10) Which command will grant a system privilege to a user?
(Points : 4)
GRANT systemprivilegeUSERNAME username
GRANT PRIVILEGE systemprivilegeTO username
13. GRANT systemprivilegeTO
username
GRANT systemprivilege ON
Username
===============================================
CIS 336 Final Exam 2
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1. (TCO 1) Most DBMS are referred to as _____________database
management systems. (Points : 4)
elemental
linked
hierarchical
relational
2. (TCO 1) A relational DBMS provides protection of the
_______________________ through security, control, and recovery
facilities. (Points : 4)
user
network
system
14. database
3. (TCO 2) If a foreign key contains either matching values or nulls,
the table(s) that make use of such a foreign key is/are said to exhibit
__________ integrity. (Points : 4)
referential
restrictive
secondary
redundant
4. (TCO 2) A field that consists of integer values is a _________ type
field. (Points : 4)
Date/Time
Yes/No
Memo
Numeric
5. (TCO 3) The PK must uniquely identify each entity instance. A
primary key must be able to guarantee unique values. It cannot
contain nulls. This rationale belongs to ____. (Points : 4)
Unique values
Nonintelligent
Preferably single-attribute
Security complaint
6. (TCO 3) A table that is in 1NF and includes no partial
dependencies only is said to be in_____________.(Points : 4)
1NF.
15. 2NF.
3NF.
4NF.
BCNF.
7. (TCO 3) A table that has all key attributes defined, has no repeating
groups, and all its attributes are dependent on the primary key, is said
to be in_____________.(Points: 4)
1NF.
2NF.
3NF.
4NF.
BCNF.
8. (TCO 4) In Oracle, the DEFAULT constraint is used to
____________________.(Points : 4)
define which column is the default primary key if one is not explicitly
named
define which column is the default foreign key if on is not explicitly
named
assign a value to an attribute when a new row is added and a value is
not defined
validate data when a value is added to an attribute
Page 2 - Multiple Choice
1. (TCO 4) Which of the following is not considered a database
object? (Points : 4)
16. a table
a view
a constraint
a sequence
an index
2. (TCO 4) Which of the following SQL statements would you use to
create a table named DEVRY? (Points : 4)
CREATE Devry
(
Student_id NUMBER (12),
Student_name VARCHAR2 (15),
Student_city VARCHAR2 (12)
);
CREATE TABLE Devry
(
Student_id NUMBER (12)
Student_name VARCHAR2 (15)
Student_city VARCHAR2 (12)
);
CREATE TABLE Devry
(
Student_id NUMBER (12),
17. Student_name VARCHAR2 (15),
Student_city VARCHAR2 (12)
);
CREATE TABLE Devry
Student_id NUMBER (12),
Student_name VARCHAR2 (15),
Student_city VARCHAR2 (12);
3. (TCO 5) The ____ constraint requires that a specific condition be
met before a record can be added to a table. (Points : 4)
UNIQUE
REFERENCE
CONDITION
CHECK
4. (TCO 5) The ___________ model is both software and hardware
dependent. (Points : 4)
conceptual
logical
condensed
physical
5. (TCO 6) The _________________________ statement can be used
to enable or disable a constraint. (Points : 4)
alter table
modify table
18. create table
update table
6. (TCO 6) When using the ALTER TABLE...DROP COLUMN
command, which of the following is not correct? (Points : 4)
The command's effect on the table is permanent.
You cannot delete the last remaining column in a table.
The command deletes both the column and its contents.
The command can be used to delete multiple columns from a table.
7. (TCO 6) Which of the following keywords can be used to change
the size, datatype, and/or default value of an existing column? (Points
: 4)
ADD
MODIFY
CHANGE
RESET
8. (TCO 7) Any type of subquery can be used in the _________
clause of a SELECT statement. (Points : 4)
WHERE
HAVING
FROM
ORDER BY
GROUP
Page 3 - Multiple Choice
19. 1. (TCO 7) Using the BOOK_CUSTOMER and BOOK_ORDER
tables shown below for references, which SQL statement will return
the same results as the following SQL statement?
SELECT * FROM book_customer, book_order;
(Points : 4)
SELECT * FROM book_order CROSS JOIN book_customer;
SELECT * FROM book_order, book_customer
WHERE book_order.customer# = book_customer.customer#;
SELECT * FROM book_order, book_customer
WHERE book_order.customer# >book_customer.customer#;
SELECT * FROM o book_order , c book_customer
WHERE o.customer# = c.customer#;
2. (TCO 7) If a Cartesian join is used to link table A which contains
five rows to table B which contains eight rows, there will be _______
rows in the results. (Points : 4)
8
13
5
40
3. (TCO 8) Based upon the contents of the BOOK_ORDER table
shown below, which of the following SQL statements will display the
ship date for order 1006 as April 2, 2002?
(Points : 4)
20. SELECT order#, TO_CHAR(shipdate, 'fmMonth DD, YYYY')
FROM book_order;
SELECT order#, TO_DATE(shipdate, 'fmMonth DD, YYYY')
FROM book_order;
SELECT order#, TO_CHAR(shipdate, 'Month DD, YYYY')
FROM book_order;
SELECT order#, TO_DATE(shipdate, 'Month DD, YYYY')
FROM book_order;
4. (TCO 8) Based upon the contents of the BOOK_ORDER table
shown below, which of the following SQL statements will display
only those orders shipped to the zip code zone that begins with 323?
(Points : 4)
SELECT order#, SUBSTR(shipzip, 1, 323)
FROM book_order;
SELECT order#, SUBSTR(shipzip, 1, 323)
FROM book_order
WHERE ;
SELECT order#
FROM book_order
WHERE (shipzip, 1, 323);
SELECT order#
FROM book_order
21. WHERE SUBSTR(shipzip, 1, 3) = 323;
5. (TCO 8) Which of the following functions determines the number
of characters in a character string? (Points : 4)
COUNT
NUMBER
LENGTH
DECODE
6. (TCO 9) Which of the following is not a valid SQL command?
(Points : 4)
UPDATE acctmanager SET WHERE ;
UPDATE acctmanager SET (amname);
UPDATE acctmanager SET (amname) WHERE ;
UPDATE acctmanager WHERE ;
7. (TCO 9) Using the promotion table shown below, which of the
following SQL statements will insert a new row into the
PROMOTION table?
(Points : 4)
INSERT INTO promotion (gift, minretail, maxretail)
VALUES (FREE BOOK, 75.01, 89.99);
INSERT INTO promotion (gift, minretail, maxretail)
VALUES ('FREE BOOK', 75.01, 89.99);
INSERT INTO promotion VALUES (FREE BOOK, 75.01, 89.99);
INSERT INTO promotion (gift, minretail)
22. VALUES (FREE BOOK, 75.01, 89.99);
8. (TCO 10) A ____ is a uniquely identifiable object that allows a
given person to log on to the database. (Points : 4)
user
role
profile
manager
9. (TCO 10) Which command will delete a user account from
Oracle9i? (Points : 4)
DELETE USER username;
DELETE USER username IDENTIFIED BY password;
DROP USER username IDENTIFIED BY password;
DROP USER username;
Page 4 - Essays
1. (TCO 2) What is Character data? (Points : 15)
2. (TCO 3) Explain the term "second normal form". (Points : 15)
3. (TCO 7) Sally needs to find all employees who have a date-of-hire
between 01-JAN-2003 and 01-JAN-2005. She writes and executes the
following query:
4. (TCO 8) In using group functions we cannot place a group function
in a WHERE clause. Explain how the WHERE clause and HAVING
clause are similar and why you can use the HAVING with a group
function but not a WHERE clause. (Points : 15)
5. (TCO 6) Write the SQL statement that will remove the database
table EMPLOYEE. (Points : 15)
23. 1. (TCO 7) Write a join query using NATURAL JOIN that for every
order in the ORDERS table will list the order number and order date
along with the cusnumber, last name, and first name of the customer
who placed the order.
2. (TCO 8) Write a query that will list the part number, part
description, and on-hand value (units on hand * unit price) for each
part in item class AP. Give the expression an alias of "On Hand
Value".
3. (TCO 8) Write a sub query that will list the part number, part
description, and units on hand of all parts where the number of units
on hand is greater than the average of units on hand for all parts.
4. (TCO 7) Using the BETWEEN operator, write a query that will list
all details about all orders that were placed during the period of
September 3rd thru September 5th of 1998.
5. (TCO 7) Write a query that will list the part number and part
description for all parts in the PART table.
(Points : 15)
===============================================
CIS 336 Final Exam 3
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1. (TCO 2) Explain what physical independence means. (Points : 15)
24. 2. (TCO 8) Sally wants to query the EMP table and determine how
many of the employees live in each of the cities the company has
factories in. She writes the following query but it does not work.
What is wrong with the way the query is constructed?
3. (TCO 3) Explain in what two specific cases presented in the text
composite primary keys are particularly useful. (Points : 15)
4. (TCO 7) How are comparisons done on character string data in a
queries WHERE clause, and why would this be especially useful in
comparing certain attributes? (Points : 15)
5. (TCO 6) Oracle will not allow the changing of a column's data type
unless the column is empty, and even then it may still be prohibited.
Discuss why? (Points : 15)
6. (TCO 7) Write a join query using NATURAL JOIN that for every
order in the ORDERS table will list the order number and order date
along with the cusnumber, last name, and first name of the customer
who placed the order.
7. (TCO 8) Write a query that will list the part number, part
description, and on-hand value (units on hand * unit price) for each
part in item class AP. Give the expression an alias of "On Hand
Value".
8. (TCO 8) Write a query that will display the customer number, first
name, and last name for every customer with a balance greater than
$50. Display the first and last name as a single column and provide an
alias for the column.
9. (TCO 7) Write a query that will list the customer number, last
name, and first name for every customer represented by sales rep 03
or sales rep 12.
10. (TCO 7) Write a query that will list the customer first and last
name and the sales rep commission rate using JOIN ON.
===============================================
25. CIS 336 Final Exam 4 Sets of Answers
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CIS 336 Final Exam 4 Sets of Answers
===============================================
CIS 336 Final Exam 4
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1. (TCO 7) For every order, list the order number, order date, part
number, part description, and item class for each part that makes up
the order.
2. (TCO 8) Write a query that will display the customer number, last
name, and first name for every customer I whose first name begins
with the letter "D".
2. (TCO 8) Write a query that will display the earliest date an order
was placed.
26. 3. (TCO 7) Using the BETWEEN operator, write a query that will list
all details about all orders that were placed during the period of
September 3rd thru September 5th of 1998.
5. (TCO 7) Write a query that will list the customer first and last name
and the sales rep commission rate using JOIN ON.
===============================================
CIS 336 Group Project
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This project is designed to touch all aspects of the fundamental
concepts of database design and logical data modeling covered during
the class. Each student will be responsible for designing, developing,
and demonstrating the functionality of a database created based on a
set of business specifications that you create. At the end of the
session, each student will submit a report that includes the logical and
physical design of the database and demonstrates the database's ability
to deliver meaningful reports. All aspects of the project will be
covered during the week or weeks prior to a deliverable, and each task
deliverable in the project will be supported through the exercises and
labs done in the course.
Guidelines
You will create a proposal for a commerce business of your choosing.
This can be an actual or fictional business that sells products and/or
services. You will determine the business rules and report
27. requirements. Entities that must be included in your model are the
following.
Customer
Product (or Service)
Order
Project Deliverables
This task is broken down into four deliverables.
· Task 0
· Task 1
· Task 2
· Task 3
Remember that this is a work in progress and in all likelihood, you
will have to make numerous changes to your tables and schema as
you go along. These changes are to be expected and are a normal part
of the database design and implementation process.
Please refer to the sections below for details regarding deliverables
for each task.
Task 0
The first task is to create your business narrative. Some of the
questions that you should address include (but are not limited to) the
following.
28. · What is the name of your business?
· Who will be the users of the system (managers, employees,
customers)?
· What product(s) and or service(s) does it sell? Be specific.
· Who are the customers? What is the customer base?
· What sales and distribution channels are used?
· How are payments made?
· Are products delivered or shipped to customers in some way?
· Are sales reps involved? Are they paid on commission?
· What type of reports are needed by the business?
Please include as much detail as possible in order to provide a
foundation for Task 1. Submit your proposal as a Word document.
Note that this proposal may be revised in the coming weeks as your
understanding of the database modeling process grows.
Task 1
Develop a detailed logical model of your database based on your
business scenario submitted for Task 0. Your data model will include
an entity-relationship diagram (ERD) developed with Microsoft Visio
or MySQL and a data dictionary (DD) developed with Microsoft
Excel.
Note that your deliverables each week include any revisions to the
previous task.
Submit your Task 1 deliverable as a zip file including the following.
29. · Task 0 proposal (with any revisions or updates)
· Your ERD copied to a Word document that fits on a single 8 x
10 page
· Your DD (Excel file)
Task 2
First, make sure to make any necessary revisions to your logical
model based on Task 1 feedback. Using MySQL, write the statements
to develop a physical model of your database by creating the tables
and constraints based on your Task 1 logical model. Be sure to use
your ERD and data dictionary and create all constraints appropriately.
Once your tables are created, you will populate them with data using
MySQL statements to insert records into the database. You should
insert a minimum of five records into each table and more where
necessary to ensure that the data in the database is sufficient to allow
for each of your reports to be tested.
The result will be a script file that includes statements to
· DROP all tables;
· CREATE all tables with constraints;
· INSERT data into all tables; and
· SELECT data from all tables to show the data in each table.
Name this file yourname_task2.txt.
Also create a Word document that shows the structure of each table
and the data in each of your tables (copy and paste from MySQL).
Name this file yourname_tables.docx.
Note that your deliverables each week include any revisions to a
previous task.
30. Submit your Task 2 deliverable as a zip file including the following.
· Task 0 proposal (with any revisions)
· Your Task 1 ERD (with any revisions)
· Your Task 1 DD (with any revisions)
· Your Task 2 script file to create and populate tables
(yourname_task2.txt)
· A Word document showing all tables and data
(yourname_tables.docx)
Task 3
Your final task is to use your tables for an update and for reports.
There are two requirements.
1. You will demonstrate an update that includes two tables and
uses a subquery. Make sure to prove that your update executed
correctly by showing data in the tables before and after the update.
2. You will also develop at least four meaningful reports. One
must include a join, one must use a subquery, and one must use an
aggregate function. You need to describe the business requirement of
the update and each report. Note that numeric PK values are not often
meaningful to a person looking at the report. You will create a script
file that has each of the queries called yourname_task3.txt. You will
also document the results of this task in a Word document called
yourname_reports.docx to show the result of each query. For the
update and each report,
· describe the update and report requirement;
· show the query; and
31. · show the result of the query.
Include a final section for Conclusions and Lessons Learned
regarding the project.Note that your deliverables each week include
any revisions to a previous task.Submit your Task 3 deliverable as a
zip file including the following.
· Task 0 proposal (with any revisions)
· Your Task 1 ERD (with any revisions)
· Your Task 1 DD (with any revisions)
· Your Task 2 script file to create and populate tables (with any
revisions)
· A Word document showing all tables and data (with any
revisions)
· Your Task 3 script file with update and reports
(yourname_task3.txt)
· A Word file with results of Task 3 and lessons learned
(yourname_reports.docx)
===============================================
CIS 336 iLab 1 Normal Forms and Entity Relationship
Diagrams
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32. CIS336 Lab 1: Normal Forms and Entity Relationship Diagrams
Introduction
In this exercise, you will analyze a de-normalized data set presented
in the form of a spreadsheet. You will next construct a series of
dependency diagrams, transforming the evolving data model from
First Normal Form (1NF), to Second Normal Form (2NF), and finally
to Third Normal Form (3NF). When the model has reached 3NF, you
will construct the Entity Relationship Diagram (ERD) depicting the
logical design of the database. Your ERD will use Crow’s Foot
notation to denote the relationships between tables.
Sample Exercise, With Solution
Before completing your lab, please review this example problem. The
diagram below is a partial depiction of a business spreadsheet for a
retail store operation. The store sells books. Books have a 13-digit
International Standard Book Number (ISBN), a title, a publisher, and
a unit price. Invoices track sales of books. An Invoice contains one or
many line items, with each line item reflecting the sale of one or more
copies of a specific book. Every publisher has a company name, and a
publisher code.
InvNum ISBN13 InvDateBookTitlePubCodePubNameQtyunitPrice
1022 9781291940336 2015-03-09 MYSQL Functions 1001 Lulu.com
3 4.99
1022 9780321833877 2015-03-09 MySQL, Fifth Edition 1029
Addison-Wesley 5 33.95
1022 9781890774820 2015-03-09 Murach’s MySQL, 2nd Edition
1032 Murach, Mike & Associates, Inc 2 48.95
1249 9781449374020 2015-02-22 MySQL Cookbook: Solutions for
Database Developers and Administrators 1118 O’Reilly Media,
Incorporated 9 50.59
33. 1249 9781449325572 2015-02-22 PHP & MySQL: The Missing
Manual 1118 O’Reilly Media, Incorporated 6 29.95
1249 9781890774790 2015-02-22 Murach’s PHP and MySQL, 2nd
Edition 1032 Murach, Mike & Associates, Inc 1 48.95
BookSales
1. Using the BookSales table structure shown above, draw the
dependency diagram, and show all dependencies, full, partial, and
transitive.
Figure 1 -solution 1
Discussion: A composite primary key consisting of InvNum +
ISBN13 can be constructed, ensuring that all rows are unique. All
remaining attributes are shown to be dependent (at least partially) on
this composite key, so the table is 1NF. Further analysis shows that
InvDate is dependent on only part of the key (InvNum), and that
unitPrice, PubCode, and BookTitle also depend on part of the key
(ISBN13). A transitive relationship is also revealed: PubName truly
depends on PubCode, which in turn depends on ISBN13.
2. Using the answer to exercise 1, remove all partial dependencies and
draw the new dependency diagrams. For each new table created,
specify its normal form (1NF, 2NF, 3NF).
Figure 2- solution 2
Discussion: To achieve 2NF, we must remove partial dependencies.
This is done by decomposing into three tables, and three dependency
diagrams at this stage. Notice that the Transitive relationship has not
yet been addressed.
3. Using the answer to exercise 3, remove all transitive
dependencies, and draw the new dependency diagrams. For each new
or revised table, specify its normal form.
34. Figure 3 – Solution 3
Discussion: The transitive relationship has been removed by creating
the Publishers table, in which PubName is fully dependent upon
PubCode. Pubcode also persists as a dependent attribute and Foreign
Key in Books. All tables are now in 3NF, and have been given
meaningful names reflecting the entities they represent. LINEITEMS
represents the collection of line items for all invoices. Invoices
represents the collection of Invoices for all customer orders. Books
makes up the list of all books available for sale (whether they have
ever been ordered or not). Each book has a publisher, and the
publisher code and Name reside in the Publishers table.
4. Draw the ERD for exercise 3, using Crow’s Foot notation.
End of Sample Exercise.
Student Exercise
The student exercise for this lab is similar to the sample exercise
presented above.
Consider the following spreadsheet containing information about
customers, their shipping and billing addresses, and the countries
corresponding to each of those addresses. A customer may be
associated with zero to many addresses. A customer may have 0 or 1
default billing address. A customer may have 0 or 1 default shipping
address. Each address may be associated with 0 or 1 countries, while
each country may be associated with 0 to many addresses.
cust_idfnamelnamedef_bill_addr_iddef_ship_addr_idaddr_idstreet_ad
dr city state zip country_codecountry_name
202 John Smith 1096 2039 1096 123 Happy Ave. Orlando FL 32801
76 United States
35. 202 John Smith 1096 2039 2039 2024 Shorline Dr. Seattle WA 98101
76 United States
202 John Smith 1096 2039 8053 100 N. Kent Ave. St. James WA 34
Jamaica
175 Hilda Yeager 2172 2172 3879 48 Spatzel Ct. Dusseldorf 5111 29
Germany
175 Hilda Yeager 2172 2172 3921 162 Rue Moritz Paris 75001 28
France
321 Siri Apple 1881 1881 1881 1 Infinite Loop Cupertino CA 95014
76 United States
Using the example solution as a guide, perform the following steps.
1. Using the CustomerAddressCountry spreadsheet show above, draw
the dependency diagram, and show all dependencies, full, partial, and
transitive. Paste your solution into the answer sheet, and label it,
Answer #1.
2. Using the answer to exercise 1, remove all partial dependencies and
draw the new dependency diagrams. For each new table created,
specify its normal form (1NF, 2NF, 3NF). Paste your solution into the
answer sheet, and label it, Answer #2.
3. Using the answer to exercise 3, remove all transitive dependencies,
and draw the new dependency diagrams. For each new or revised
table, specify its normal form. Paste your solution into the answer
sheet, and label it, Answer #3.
4. Draw the ERD for exercise 3, using Crow’s Foot notation. Paste
your solution into the answer sheet, and label it, Answer #4.
===============================================
CIS 336 iLab 2 The Expanded Entity Relationship Diagram
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CIS336 Lab 2: The Expanded Entity Relationship Diagram
LAB OVERVIEW
Scenario and Summary
This lab introduces the next step in creating a data model, the Entity
Relationship Diagram (ERD). You will be given a business scenario
for a University Medical Center, which is a small community
hospital. The business specifications will outline a number of things
about the business, some of which will apply directly to the database
you are being asked to model. There is a table that lists the entities
(tables) that will be needed for the database and related attributes
(columns) for each entity. There is also a column that lists specific
information about the entity that will be helpful in determining its
relationship to other entities within the model.
Be sure to include the minimum and maximum occurrences of each
relationship (cardinality) and to supply a name to the relationship that
will work in both directions. Make sure to use Crow’s Feet notation in
your ERD.
Narrative/Case Study
The University Medical Center is a small, community hospital. A new
hospital administrator has recently been hired by the Board of
Directors, and directed to right-size patient care and pharmacy
services and improve profitability. The hospital operates three clinical
facilities: the main hospital, a mid-town clinic, and an Urgent Care
location. The hospital also offers selected in-home care services.
Many of the patients are repeat or regular patients who receive regular
37. treatment for various conditions, and many utilize the hospital’s
pharmacy services for prescription medications.
The pharmacy dispenses about 3,000 different prescription
medications of various kinds. Every prescription is associated with
one patient, and is logged by the dispensing clinic. The new
administrator wants to know which drugs are most prescribed, and
also which are the most profitable.
The following is some general information about the organization and
its current processes.
• The hospital operates three clinical facilities.
• A healthcare worker logs in at a facility at the start of a shift and
logs out at the end.
• The name, address, Social Security number and other information is
recorded for every healthcare worker.
• All healthcare workers have one billing rate, which is determined by
their job description.
• Each medication dispensed by prescription is linked to both the
prescription number and the medication ID number, recording the
item price and the quantity dispensed.
As a convenient and affordable means of providing hospice care,
palliative care, and convalescent care to patients that need
occasional/intermittent skilled nursing, but do not require
hospitalization, the hospital offers limited in-home care. Recording of
in-home care includes the healthcare worker ID, their departure time
and return time, and also the prescription ID for any prescriptions
administered by the healthcare worker in the home setting.
The hospital administrator would like to know what home-care visits
have been made to whom, by whom, when, and how long they took.
There is concern at this point that the cost of providing limited home
healthcare is not providing adequate return on investment, and the
program should be revised or discontinued.
38. Requirements
You have been asked to develop a logical data model for University
Medical Center based on the information given to you by the new
hospital administrator and their staff. Through analysis of the nouns
and verbs in the case study above, you have accumulated the
following entity, attribute, and relationship information shown in the
table below. The attribute list may not be complete. If you determine
that additional attributes are needed to better define an entity, then
you should add them.
Entities Attributes and Relationships for University Medical Center
(Parallel Lab Exercise):
Entity Attributes Relationships
HealthcareWorkerHealthcareWorkerID, LastName, FirstName, SSN,
Address, City, State, Zip, Phone Number, HealthcareWorkerTypeID
A healthcare worker can belong to any one of the three job categories,
but can belong to one and only one of the three. healthcare worker has
names and other contact information.
HealthcareWorkerTypeHealthcareWorkerTypeID,
HealthcareWorkerTypeDesc, HourlyBillingRate A healthcare worker
can be either a physician (diagnoses, prescribes medication), nurse
(provides physician-ordered treatments, administers medications), or
a pharmacist (dispenses, delivers medication).
ClinicLogClinicLogID, ClinicID, Login, Logout,
HealthcareWorkerID Patients may be treated by a healthcare worker
at a clinic and can be tracked by the clinic log number. A healthcare
worker must sign into the clinic before he or she can serve patients,
and must sign out when finished treating patients at that clinic. A
healthcare worker may serve portions of a shift at more than one
clinic.
Clinic ClinicID, ClinicLocationDesc, AMAAccredNum The hospital
operates three clinical facilities: General Hospital, Midtown Clinic,
and Urgent Care.
39. InHomeCareInHomeCareID, HealthcareWorkerID, PrescriptionID,
DepartTime, ReturnTime. Relates to both the healthcare worker and
the prescription entities. This entity will help track provision of home
healthcare. A healthcare worker can provide many home visits but a
prescription is administered on a home visit by one and only one
healthcare worker.
Method MethodID, Method Description Relates to medication and
identifies the method of administration, for example, oral, injection,
and so on.
Medication MedicationID, MedicationName, Dosage, Cost,
QuantityOnHand, LastPurchasedDate, ReorderMinimum Identifies
the medication the hospital pharmacy dispenses. One or more
medications can be dispensed per prescription. The quantity on hand
allows Pharmacists to determine the inventory levels. The reorder
minimum can be used to determine when the inventory level has
reached a reorder point.
Prescription PrescriptionID, MedicationID, BillingAmount,
TransactionDateTime, ClinicLogID, PatientID A prescription is
identified by a single prescription order. Prescriptions are
• made to one or more patients but only one patient at a time;
• made by one or more pharmacists but only one pharmacist per
prescription;
• recorded on one or more clinics but only one clinic per prescription;
and
• administered by one or more nurses but no one prescription can be
administered by more than one nurse.
PrescribedMedicationPrescriptionID, MedicationID, ItemPrice,
QuantityDispensed Prescribed medication is part of a prescription and
records medication dispensed per prescription. Prescribed medication
must be able to associate multiple medications sold on a single
prescription number.
40. Patient Patient Number, First Name, Last Name, Address, City, State,
Zip, Phone Number A patient can be associated with multiple
prescriptions, but any one prescription is to one and only one patient.
A prescription can occur without a patient registering in the system
(e.g., an unconscious patent arrives by ambulance in the emergency
room and receives life-saving emergency treatment).
Using an appropriate drawing/data modelling tool, develop an ERD
that meets the following guidelines.
• Draw the entities with their attributes.
• Indicate the relationships between the entities using Crow’s Foot
notation. You will need to determine the cardinality and optionality
for each direction of the relationships. Some of the Foreign Key
relationships are identified in the graph above but not all. Be sure you
identify and account for all Foreign Key relationships.
• Add a name (in both directions) to the relationships. Remember, if
you can verbalize the relationship in both directions, then you
probably have a valid relationship.
Deliverables
The deliverable for this lab will be your completed ERD as a single
MS Word document using copy/paste or imported as an image from
your drawing/modelling application, cropped and sized appropriately
(it should fit on a single page), and named lab2_solutions_yourname.
LAB STEPS
STEP 1: Drawing Entities and Attributes
Back to Top
Be sure to include all of the entities that have been defined. You need
to include at least the primary and foreign key attributes where
applicable in your diagram.
STEP 2: Add Relationships
41. Back to Top
Be sure that you link all entities based on PK to FK relationships.
There may be a case where you need to identify a combination PK
and if so make sure that all of the relationships involved are defined.
Be sure that you have set your drawing/modelling tool set to show
Crow’s Foot notation. Also, be sure that you are defining the correct
cardinality for the relationships.
STEP 3: Naming of relationships
Back to Top
If your drawing/modelling tool creates a default name for
relationships, do not simply accept this default without due
consideration. There may be some relationships where the default is
applicable, but in most cases you will want to explicitly name the
relationship. Be sure that you have provided a verb phrase for both
directions in the relationship.
This is the end of lab #2
===============================================
CIS 336 iLab 3 Building the Physical
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CIS-336: Lab 3: Building the Physical
LAB OVERVIEW
Scenario and Summary
42. The lab for this week addresses taking a logical database design (data
model) and transforming it into a
physical model (tables, constraints, and relationships). As part of the
lab, you will need to download the
zip file titled CIS336Lab3Files from Doc Sharing. This zip file
contains the ERD, Data Dictionary, and test
data for the tables you create as you complete this exercise.
Your job will be to use the ERD Diagram found below as a guide to
define the table structures and
constraints using both CREATE TABLE and ALTER TABLE
statements. Once this has been done, you will
need to write the INSERT INTO TABLE statements to insert the data
provided into the table. The data
should verify that the constraints you have created are valid and
define the correct referential and data
integrity constraints asked for. Lastly, you will write SELECT
statements to query the tables and verify
the data was populated. Please use exactly the data provided, without
addition, deletion, or alteration
except as directed, as your results may be evaluated against expected
results generated using this exact
data set.
Narrative/Case Study
For this lab, you will be creating SQL statements to build a series of
relational tables, using SQL CREATE
statements in a script file format for the Student Database. You will
then populate those tables through
43. the use of INSERT statements with sample data.
You will need to create a script file and name it YourName_Lab3.txt
containing the following code.
1. The drop table statements listed later in the specifications of this
lab.
2. The CREATE TABLE statements required to build the six tables.
3. The INSERT statements necessary to insert all of the sample data.
4. Six select statements to verify that the data is in the tables and
accessible.
To help you accomplish this task successfully, you are being supplied
with the ERD Diagram which
follows, and the exact data to be inserted into each table, which may
be found via the Doc Sharing tab
on the course website.
The following guidelines are being provided to help assist you in
creating your script file.
· Use the names for the tables and columns as listed in the ERD. Do
not change them as it will
affect your grade.
· Creating Constraints
o Create all NOT NULL constraints as indicated in the ERD.
o Create all PK constraints as indicated in the ERD.
o Create all FK constraints as indicated in the ERD.
· Create all of the tables and all of the constraints before populating
any of the tables with data.
44. · Because FK constraints will be in place when the insert statements
are executed, you will need
to consider carefully which tables must be created before others in
order to ensure that FK
constraints are not violated.
· The COURSE table has a self-referencing FK constraint.
Specifically, some courses have
prerequisite courses. Consequently, the record for a course possessing
a prerequisite course
cannot be successfully inserted into the table unless the record for the
prerequisite course has
already been inserted. This may require you to reorder the insert
statements to resolve FK
violations when loading the table. You may reorder the data provided
for this table, but do not
alter it.
· The data for one table intentionally contains a record containing an
FK constraint that is not
resolved by a record in the parent table. This orphaned record has
been included as an exercise
for you to find. Because this record has an unreconciled FK
constraint, it cannot be successfully
inserted. You will need to delete or comment out the insert statement
for this one record in
order to produce a script that runs without errors.
· Aside from reordering the data for the COURSE table as necessary,
and commenting
45. out/deleting the ONE record whose FK dependency cannot be
resolved by the data provided,
you are NOT to modify, add to, or delete from the data provided.
Your SQL script must produce
tables containing data identical to the expected solution set, or points
will be deducted.
· ALL character strings must be enclosed in single quotes. This
includes alpha strings and
alphanumeric (remember that any formatting within a numeric string
makes it alphanumeric).
· If you are inserting a NULL, do not enclose the word NULL in
single quotes, as this will insert the
word NULL into the row. To insert a null you simply use the word
NULL.
Deliverables
The deliverable for this lab will include the following documents.
1. Your script file. Create this file in Notepad, or another PURE
TEXT editor—NOT Word. Make sure
your name is in a comment area at the top of the script file. Use a
double dash to create a one-
line comment.
–Jane Smith
–Lab 3
2. Your script file must execute without error. It is recommended that
you begin early in the week,
46. and post any questions to the Q & A discussion in order to produce a
working script by the due
date.
Be sure your name is on all documents and that all documents have
been included in a single zip file for
this week’s assignments.
Refer to the following ERD in constructing your solution.
Student
PKStudent_ID
Salutation
First_Name
Last_Name
Street_Address
Phone
Employer
Registration_Date
FK1Zip
Enrollment
PK,FK1Section_ID
PK,FK2Student_ID
Enroll_Date
Final_Grade
47. LAB STEPS
STEP 1: The DROP Statements
A DROP TABLE statement must appear in your script file, prior to
the SQL statements for creating
the table in question. This will allow you to run and re-run your script
file as often as you need to. The
very first time you run your script the table does not exist, so the IF
EXISTS clause causes the statement
to be ignored. Thereafter, the table will be deleted, ensuring that your
CREATE TABLE statement creates
the table fresh and clean, with only the attributes present in the current
revision of the CREATE
statement. Here is an example of one of the six DROP TABLE
statements you will need to create.
DROP TABLE IF EXISTS `ENROLLMENT` ;
STEP 2: The CREATE TABLE Statements
Next, define the CREATE TABLE statements for the six tables that
you are to create based upon the
ERD (provided above) for this lab. Be sure to follow the guidelines
given above on how and where to
create the different types of constraints for each table. This will
include PK, FK, and NOT NULL
constraints.
STEP 3: The INSERT Statements for the Data
The third step is to create the insert statements to insert the sample
data into the tables created in
48. Step 2. The data for each table is contained in text files, named for the
table whose data it contains.
Modify the format of the data (e.g., date formats and add or eliminate
quote marks) as needed to craft
your insert statements, but do not change the inherent value of the
data.
STEP 4: The SELECT Statements
The next step of the lab will be to create the select statements to
verify the data was inserted
correctly. You should have six select statements; one for each table.
The command is SELECT * FROM
Table_Name; For example, to select all columns from the Student
table, the command would be
SELECT * FROM student;
Be sure to save all of the above statements in your script file.
STEP 5: Testing and Verifying Your Script
Now we come to the point of verifying that your script file works by
creating all of the tables and
inserting and selecting all of the data. Your script should execute
without errors, and select the entire
contents of each table in turn. Inspect your query results to ensure that
each column and row from
each of the tables is as expected. Correct and repeat testing of your
script until no errors occur, and the
results match expectations. You may also use the DESCRIBE
command to display the table structure of
49. each table, and verify that PK and NULL constraints have been
properly created. The SHOW CREATE
TABLE statement is useful for displaying the SQL that would
regenerate a given table, which is a useful
way for checking that FKs have been properly created.
Examples:
DESCRIBE STUDENT;
SHOW CREATE TABLE STUDENT;
This is the end of Lab 3
===============================================
CIS 336 iLab 4 Introduction to Select, Insert, Update, and
Delete Statements (only SQL Command, No output)
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CIS336: Lab 4: Introduction to Select, Insert, Update, and Delete
Statements
LAB OVERVIEW
Lab 4 will introduce the various aspects of the SQL select statement
and the methods of retrieving data from the database tables. This lab
will also introduce the fundamentals of updating and deleting records.
This lab may be completed using either DeVry’sOmnymbus EDUPE-
APP lab environment, or a local copy of the MySQL database running
on your own computer using the OM database tables. The lab will
50. utilize a set of tables that are represented by the ERD
(OM_ERD.docx) and are created and populated by the script file
(create_OM_db.sql). Follow the instructions in the file
CreateOMTables.docx to create your database, tables, and data.
A few IMPORTANT things to note if using EDUPE MySQL:
**There can be NO SPACES in alias names given to a column. For
example:
Select unit_price as “Retail Price “ from items; –this does NOT work
in EDUPE MySQL.
Any of the following WILL WORK:
Select unit_price as “RetailPrice” from items;
Select unit_price as “Retail_Price” from items;
Select unit_price as Retail_Price from items;
Select unit_price as RetailPrice from items;
**Any calculated fields MUST be given an alias (and note above NO
SPACES in alias). For example:
select unit_price * 2 from items; –this does NOT work in EDUPE
MySQL
This will work:
select unit_price * 2 as NewPrice from items;
Deliverables
• Lab Report (Answer Sheet) containing both the student-created SQL
command(s) for each exercise, and the output showing the results
obtained. Be sure your name is on the file.
LAB STEPS: Complete each of the exercises below.
51. 1. Write a query that displays a list of all customers showing the
customer first name, last name, and phone number. Sort the results by
customer last name, then first name.
2. Write a query that displays each customer name as a single field in
the format “firstnamelastname” with a heading of Customer, along
with their phone number with a heading of Phone. Use the IN
operator to only display customers in New York, New Jersey, or
Washington D.C. Sort the results by phone number.
3. Write a query that will list all the cities that have customers with a
heading of Cities. Only list each city once (no duplicates) and sort in
descending alphabetical order.
4. Write a query that displays the title of each item along with the
price (with a heading of Original) and a calculated field reflecting the
price with a 25% discount (with a heading of Sale). Display the sale
price with two decimal places using the ROUND function. Sort by
price from lowest to highest.
5. Write a query that displays the customer_first_name,
customer_last_name, and customer_city from the customers table.
Use the LIKE operator to only display customers that reside in any
zipcode beginning with 4.
6. Write a query that displays the order id and order date for any
orders placed from March 1, 2014 through April 30, 2014. Do this
WITHOUT using the BETWEEN clause. Format the date field as
Month dd, yyyy and use a heading of “Ordered”.
7. Write a query that displays the order id and order date for any
orders placed during the month of May, 2014. Do this using the
BETWEEN clause. Format the date field as mm/dd/yy and use a
heading of “Ordered”.
8. Write a query which displays the order id, customer id, and the
number of days between the order date and the ship date (use the
DATEDIFF function). Name this column “Days” and sort by highest
52. to lowest number of days. Only display orders where this result is 15
days or more.
9. Write a query which displays the order id, customer id and order
date for all orders that have NOT been shipped, sorted by order date
with the most recent order at the top.
10. The Marketing Department has requested a new report of shipped
orders for which the order was placed on either a Saturday or a
Sunday. Write a query which displays the order id, order date,
shipped date, along with a calculated column labeled “Order_Day”
showing the day of the week the order was placed (use the
DAYNAME function). Only display orders that have shipped and
were placed on a Saturday or Sunday. Sort by order date with most
recent orders at the top.
11. Write a query to display the customer last name, phone number,
and fax number but only display those customers that have a fax
number.
12. Create a statement to insert a new record into the items table with
the following values:
item_id: 11
title: Ode To My ERD
Artist_id: 15
unit_price: 12.95
Show your INSERT statement along with the results of the following
SELECT query to verify that the insert worked correctly.
select * from items where item_id> 10;
13. Create a statement to update the record inserted in the previous
step to change the unit price of this item to 7.95.
item_id: 11
53. title: Ode To My ERD
artist: 15
unit_price: 7.95
Show your UPDATE statement along with the results of the following
SELECT query to verify that the insert worked correctly.
select * from items where item_id> 10;
14. Create a statement to delete the entire record that was inserted and
then updated in the previous steps.
Show your DELETE statement along with the results of the following
SELECT query to verify that the insert worked correctly.
select * from items where item_id> 10;
15. Using the SUBSTRING and CONCAT functions, write a query to
display each customer name as a single field in the format “Jones,
Tom” with a heading of Customer along with the customer_phone
field in a nicely formatted calculated column named Phone. For
example, a record containing the customer_phone value 6145535443
would be output with parentheses, spaces, and hyphens, like this:
(614) 555-5443.Sort by last name.
This is the end of Lab 4.
===============================================
CIS 336 iLab 5 Joining Tables
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54. CIS336: Lab5: Joining Tables
LAB OVERVIEW
Scenario and Summary
Lab 5 will introduce the concept of multi-table JOINS in order to
work with data in two or more related tables simultaneously. This lab
may be completed using either DeVry’sOmnymbus EDUPE-APP lab
environment, or a local copy of the MySQL database running on your
own computer using the OM database tables. The lab will utilize a set
of tables that are represented by the ERD (OM_ERD.docx) and are
created and populated by the script file (create_OM_db.sql). Follow
the instructions in the file CreateOMTables.docx to create your
database, tables, and data.
A few IMPORTANT things to note if using EDUPE MySQL:
**There can be NO SPACES in alias names given to a column. For
example:
Select unit_price as “Retail Price “ from items; –this does NOT work
in EDUPE MySQL.
Any of the following WILL WORK:
Select unit_price as “RetailPrice” from items;
Select unit_price as “Retail_Price” from items;
Select unit_price as Retail_Price from items;
Select unit_price as RetailPrice from items;
**Any calculated fields MUST be given an alias (and note above NO
SPACES in alias). For example:
select unit_price * 2 from items; –this does NOT work in EDUPE
MySQL
This will work:
55. select unit_price * 2 as NewPrice from items;
Deliverables
• Lab Report (Answer Sheet) containing both the student-created SQL
command(s) for each exercise, and the output showing the results
obtained. Be sure your name is on the file.
LAB STEPS: Complete each of the exercises below:
1. Use the JOIN ON syntax to write a query to display the order id,
order date, customer name formatted as a single field (i.e. “Tom
Jones”) with a heading of Customer, and customer_city for customers
residing in the state of OHIO. Sort the output to display the newest
orders first.
2. Use the JOIN USING syntax to display the order_id, order date,
and shipdate for orders to Karina Lacy that have shipped.
3. Use the implicit join syntax (the WHERE clause) to display the last
name, city, order date and ship date for all orders shipped in 2012.
4. Use any join syntax EXCEPT NATURAL JOIN to list the
customer_first_name and customer_last_name concatenated with an
intervening space as Customer, customer city and state formatted as a
single column in the format of “city, ST” with a heading of Location,
order_id and order date for orders that have not shipped.
5. List the customer name, order date, zipcode for any customer(s)
placing an order for the item titled ‘Etcetera”.
6. Write a query to list the title and artist of ONLY the items that have
been ordered. Only list each title once.
7. Write a query to list the title and price of all items that have been
ordered by customer Millerton.
8. Write a query to list the last name and order id of customers that
ordered any items by the artist Burt Ruggles?
56. 9. Write a query to display a list of titles along with the artist name.,
sorted by artist name.
10. Write a query to display an invoice for order 693 including the
title, quanty, price, and a calculated column to display the line item
subtotal (quantity times price) with a heading of Subtotal.
11. Display the order id, last name, title , and quantity for any items
where customers have ordered 2 or more of a particular item in an
order.
12. The employees table contains a list of employees of a company.
An employee may be managed by another employee. To denote an
employee’s manager, the employee_id of the manager is entered into
the manager_id field of the employee reporting to that manager. In
order to produce a list of which managers supervise which employees,
the table may be joined to itself using these two attributes
(employee_id, manager_id). This is known as a SELF-JOIN. Use a
SELF-JOIN on the employees table to produce a result containing two
columns: the concatenated last_name and first_name of the manager,
and the concatenated last_name and first_name of the employee.
Label the first-column supervisor, and the second-column employee.
Order the output by the supervisor’s last_name and first_name.
13. Write a query to display the order id, order date, ship date, and
customer last name for all SHIPPED orders placed on the internet (no
employee id). Show the most recently shipped orders first.
14. Write a query that displays the order id, order date, and employee
name as a single field labeled Employee for each order that an
employee assisted with.
15. Write a query that displays the order id, order date, customer
name as a single field labeled Customer for all orders for the sales rep
Thomas Hardy, sorted by customer last name.
This is the end of Lab 5.
===============================================
57. CIS 336 iLab 6 Group Functions and Subqueries
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CIS336: Lab 6: Group Functions and Subqueries
LAB OVERVIEW
Scenario and Summary
Lab 6 will introduce the concept of group functions and subqueries to
meet more complex report requirements. This lab may be completed
using either DeVry’sOmnymbus EDUPE-APP lab environment, or a
local copy of the MySQL database running on your own computer
using the OM database tables. The lab will utilize a set of tables that
are represented by the ERD (OM_ERD.docx) and are created and
populated by the script file (create_OM_db.sql). Follow the
instructions in the file CreateOMTables.docx to create your database,
tables, and data.
A few IMPORTANT things to note if using EDUPE MySQL:
**There can be NO SPACES in alias names given to a column. For
example:
Select unit_price as “Retail Price “ from items; –this does NOT work
in EDUPE MySQL.
Any of the following WILL WORK:
Select unit_price as “RetailPrice” from items;
58. Select unit_price as “Retail_Price” from items;
Select unit_price as Retail_Price from items;
Select unit_price as RetailPrice from items;
**Any calculated fields MUST be given an alias (and note above NO
SPACES in alias). For example:
select unit_price * 2 from items; –this does NOT work in EDUPE
MySQL
This will work:
select unit_price * 2 as NewPrice from items;
Deliverables
• Lab Report (Answer Sheet) containing both the student-created SQL
command(s) for each exercise, and the output showing the results
obtained. Be sure your name is on the file.
LAB STEPS: Complete each of the exercises below.
1. Write a query to determine the total number of items on each order.
Display the order_id and the total with a heading of TotalItems (note
no spaces). Filter to only display information for order_id of 600 or
higher.
2. Re-do query 1 but filter to only show those orders with more than 2
items ordered. Sort by the number of items ordered, lowest to highest.
3. The order_details table has a quantity for each item ordered. Show
the total amount charged for each item on the order (quantity times
price). Display order_id, the item id, the unit price, the quantity times
price of the item labeled as “Itemtotal” (note NO spaces). Sort by
order id and filter to only display those order ids between 400 and
700.
59. 4. Write a query to display the total amount for each order: show the
order id and total. Sort by descending order on the total and only
display orders with a total of $40 or more.
5. Re-do query 4 but show the customer name for each order
(formatted as a single field with heading of Customer) along with the
city, order id and total. Filter to only display customers that live in
California. Sort by city.
6. Display the total amount of sales per item. Show title, total quantity
sold with a heading of Quantity, total sales with a heading of
“TotalSales” (not NO space). Sort by highest to lowest total.
7. Display the total sales for each customer: show customer name (as
single field) with a heading of Cutomer and total. Sort lowest to
highest total. Filter to only display customers with $50 or more in
total orders.
8. Use subqueries to determine which (artist) had the item ordered in
highest quantity on an order? First determine the highest quantity on
any order, then determine the item number associated with it, then
display the artist.
9. Display the total sales by artist: show artist name, total. Sort highest
to lowest.
10. USE A SUBQUERY to Increase price of all items by ‘No Rest for
the Weary’ by 10%. If working in MySQl you will need to disable
safe mode. Show prices before and after. Rollback after.
11. USE A SUBQUERY to display names of customers that have
unshipped orders.
12. Display the total amount of sales made to customers in NY
13. USE A SUBQUERY to list the items (title and artist) of items that
have never been ordered
14. Show the order history for Samuel Jacobsen. Display the order id,
order date, ship date, and total.
60. 15. Show the total amount of sales per sales rep. Display the
employee name as a single field along with the total sales, sorted by
highest to lowest sales.
This is the end of Lab 6.
===============================================
CIS 336 iLab7 Working with Views
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CIS-336: Lab7: Working with Views
LAB OVERVIEW
Lab 7 will introduce the concept of database views. This lab may be
completed using either DeVry’sOmnymbus EDUPE-APP lab
environment, or a local copy of the MySQL database running on your
own computer using the OM database tables. The lab will utilize a set
of tables that are represented by the ERD (OM_ERD.docx) and are
created and populated by the script file (create_OM_db.sql). Follow
the instructions in the file CreateOMTables.docx to create your
database, tables, and data.
A few IMPORTANT things to note if using EDUPE MySQL:
**There can be NO SPACES in alias names given to a column. For
example:
Select unit_price as “Retail Price “ from items; –this does NOT work
in EDUPE MySQL.
Any of the following WILL WORK:
61. Select unit_price as “RetailPrice” from items;
Select unit_price as “Retail_Price” from items;
Select unit_price as Retail_Price from items;
Select unit_price as RetailPrice from items;
**Any calculated fields MUST be given an alias (and note above NO
SPACES in alias). For example:
select unit_price * 2 from items; –this does NOT work in EDUPE
MySQL
This will work:
select unit_price * 2 as NewPrice from items;
Deliverables
• Lab Report (Answer Sheet) containing both the student-created SQL
command(s) for each exercise, and the output showing the results
obtained. Be sure your name is on the file.
LAB STEPS: Complete each of the exercises below.
1. Use an ALTER TABLE statement to update the customers table so
that the Primary Key field is an auto-increment field, then create
TWO insert statements to test proper operation, using your own first
and last name for one (and a name of your choice for the second one),
and any data you care to imagine for the remaining fields.
IMPORTANT NOTE: When using a LOCAL copy of MySQL, if you
attempt to simply issue the ALTER TABLE command you have
composed by itself, you should receive an error similar to the
following (try it for yourself!).
ERROR 1833: Cannot change column ‘customer_id’: used in a
foreign key constraint ‘orders_fk_customers’ of table ‘om.orders’
62. (Note – EDUPE will not give this error message, however you should
still follow the CORRECT procedure as discussed here to complete
this problem).
The reason for this is that you are attempting to alter data in one
column that has a defined PK:FK relationship to a field in another
table. Referential Integrity rules prevent this. So, how do you resolve
such a problem?
One approach to solving this dilemma is to turn off the foreign key
checks that implement referential integrity rules. However, the danger
here is that other users and processes operating on the database while
these constraints are suspended could create or modify data in a way
that compromises integrity. We can solve this second problem by
preventing other users and processes from altering the data in the
table in which we are working until we have turned the foreign key
checks back on. We therefore need to construct a script that does the
following.
a) Locks the customer table – lock table customers write;
b) Turns off FK checks – set foreign_key_checks = 0;
c) Alters the table to add the auto_increment feature to the PK field
d) Turns FK checks back on – set foreign_key_checks = 1;
e) Unlocks the customer table – unlock tables;
It is VERY important to consider that altering tables can require a bit
of time for very large tables, and that while the table is locked, other
users and processes cannot operate. Consequently, this kind of
modification should not be done during peak operating hours in a
production operation (as a student in a lab exercise, working on your
own database, you may do this at any time) but ideally in hours
during which the business does not normally operate. In cases where
round-the-clock, high availability of a database is required, other
approaches may be required. Addressing this problem in a high-
availability, high-demand environment is an advanced topic, study of
63. which is outside the scope of this course. Use the outline below to
construct your script. Show all commands in your answer sheet along
with the output of the commands.
lock table customers write;
set foreign_key_checks = 0;
– Replace this comment with your ALTER TABLE command to add
the auto_increment feature to the PK field
set foreign_key_checks = 1;
unlock tables;
–statements to insert two rows into the table
–verify auto_increment with a select statement
2. The Vice President of Marketing for your firm wants the firm’s
sales representatives to be able to directly view and edit customer
details, but only for the state to which a particular sales representative
is assigned. You have suggested that this need can be addressed with
a view. For example, a view could be created for one particular state,
and user account permissions for accessing that view granted only to
sales representatives from that state. The VP has asked you to quickly
create a simple proof-of-concept demonstrating how this might work.
Complete the following steps:
a. Construct a view on the customers table called CA_CUSTOMERS
that consists of all data about customers that live in California.
b. Display the data using this view to verify that only customers that
reside in California are visible.
c. Prove that It is possible to add or update records through this view
by updating the record for Karina Lacy to change the spelling of
Karina’s last name to Lacie.
64. d. Display the data using the customer table to verify that the change
has been made.
Show all commands in your answer sheet along with the output of the
commands.
3. The Senior Customer Service Manager has requested the ability to
create a report at any time that will show shipped orders that took
some specified number of days to fulfill.
a. Create a view named SHIPPING_TIME that lists only
customer_first_name, customer_last_name, order_date, shipped_date,
and the calculated field days_to_fulfill (use the DATEDIFF function)
showing the number of days between when the customer placed the
order and when it was shipped. Show the data from this view.
Now let’s do some queries by adding sorting and filters USING THIS
VIEW, WITHOUT CHANGING IT.
b. Use the view to display the data sorted by highest to lowest days to
ship
c. Use the view to display only the orders that took less than 10 days
to ship.
d. Use the view to display only the orders that took more than 30 days
to ship.
4. Queries that require joins and aggregate functions can be easier to
construct when using a view as a “temporary” table. Consider a report
to show total sales by artist.
a. First create a view called SalesData that displays the order_id,
item_id, the calculated field ItemTotal (which is quantity times price),
the title and artist_id.
b. Display the data in the SalesData view sorted by artist_id. Does this
help you to “visualize” how to group the data to create the totals?
65. c. Create a query USING THIS VIEW and the appropriate aggregate
function to display artist_id and the total sales for each artist.
d. Now join to the artist table in order to display the artist_name along
with the total sales.
5. Now use this same method to display the total sales per customer.
a. Create a view called SalesData with the appropriate data. At a
minimum you will need customer_id and the calculated item total.
DO NOT use the customer table in this view, it will be joined later.
b. Display the data in your view sorted by customer_id. Does this help
you to “visualize” how to group the data to create the totals?
c. Create a query USING THIS VIEW and the appropriate aggregate
function to display customer_id and the total sales for each customer.
d. Now join to the customer table in order to display the
customer_name as a single field named Customer along with the total
sales. Sort the report by Total sales in descending order.
This is the end of Lab 7.
===============================================
CIS 336 Quiz 1
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(TCO 3) Normalization works through a series of stages called
normal forms. Typically _________ stages must be completed before
a table can be considered normalized.
66. (TCO 3) The conflicts between design efficiency, information
requirements, and processing speed are often resolved through
(TCO 3) The PK must uniquely identify each entity instance. A
primary key must be able to guarantee unique values. It cannot
contain nulls. This rationale belongs to
(TCO 9) The SQL command that lets you insert data into a table, one
row at a time, is _____________.
(TCO 4) Which command is used to restore the table's contents to
their default values?
(TCO 4) Which of the following SQL commands would alter the table
DEVRY and add a foreign key that references the CITY table?
(TCO 4) The SQL command that lets you save your work to disk, is
___________
(TCO 9) If the INSERT INTO command is used to insert data values
that violate an existing constraint in a table, which of the following
will happen?
(TCO 3) Explain under what circumstances a partial dependency can
exist in a database.
===============================================
CIS 336 Quiz 2
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(TCO 2) Explain what a composite attribute is
67. (TCO 1) Data constitutes the building blocks of
(TCO 1) Successful database design is first and foremost based on
_____________ requirements.
(TCO 1) The lowest level in a database hierarchy is the
____________ or value as it is often referred
(TCO 2) The term _____________ design is used to refer to the task
of creating the conceptual data model represented by an Entity
Relationship Diagram (ERD).
(TCO 2) Within a table, the primary key must be unique so that it will
identify each row. When this is the case, the table is said to exhibit
___________.
(TCO 2) A field that consists of data values that can be used for
arithmetic procedures is a _________ type field.
(TCO 2) A relationship is an association between ___________
(TCO 5) The _____________ model represents a global view of the
data.
(TCO 5) In Crow's Foot notation, a forked end means
===============================================
CIS 336 Quiz 3
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(TCO 7) Which of the following types of columns will automatically
right-align the data when it is displayed?
68. (TCO 7) Which of the following SQL statements will display the
profit generated by each book currently stored in the BOOKS table?
(You do not need to see the table structure for this question)
(TCO 7) Which of the following will display the new retail price of
each book as 20 percent more than it originally cost?
(TCO 7) Which of the following operators would be most appropriate
to determine whether or not the retail price of a book is at least
$24.00?
(TCO 7) The ______________________ comparison operator is used
to indicate that a data value must fall within a range of values to be
included in the query results.
(TCO 7) Based upon the contents of the BOOK_ORDER table shown
below, which of the following queries will display all orders that were
not shipped for at least three days after the order was received?
(TCO 7) ANSI-standard SQL allows the use of a special operator in
conjunction with WHERE clause. A special operator used to check
whether an attribute matches one from a subquery is_______.
(TCO 7) A ____ occurs when a relationship is improperly or
incompletely identified and, therefore, is represented in a way that is
not consistent with the real world.
(TCO 7) The ______________________ comparison operator is used
to search for values which are not NULL.
TCO 7) You want to write a query that will return the customer
number, first and last name from the book_order table (shown below)
for all customers who have a P.O. Box and who live in either Trenton
or Chicago. Write the query that will accomplish this task.
===============================================
CIS 336 Quiz 4
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(TCO 8) If a Cartesian join is used to link table A which contains five
rows to table B which contains eight rows, there will be _______
rows in the results.
(TCO 8) Which of the following statements will produce the value
21.1?
(TCO 8) Which of the following format elements will display
insignificant leading zeros?
(TCO 8) Oracle’s pseudo table used only for cases where a table is
not really needed is _________?
(TCO 7) Using the BOOK_CUSTOMER and BOOK_ORDER tables
shown below for reference which SQL statement will return the same
results as the following SQL statement?
(TCO 7) A table alias or qualifier cannot be assigned in the FROM
clause of which type of join?
(TCO 7) The _______ query joins a table to itself using aliases to
distinctly identify each instance of the table.
(TCO 7) Explain the difference between an inner join and an outer
join.
===============================================
CIS 336 Quiz 5
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70. (TCO 6) Which of the following keywords is used to remove a row in
a table?
(TCO 6) When using the ALTER TABLE...DROP COLUMN
command, which of the following is NOT correct?
(TCO 6) Which of the following commands will add a new column
named FIRSTORDERDATE to the CUSTOMERS table to store the
date that the customer first placed an order with the company?
(TCO 8) Which of the following is NOT a valid statement?
(TCO 8) Based on the contents of the BOOKS table shown below,
which of the following SQL statements will return the total profit
generated by books in the COOKING category?
(TCO 8) Which comparison operator evaluates a subquery and if it
returns false, will not execute the calling query?
(TCO 8) The following SQL statement contains which type of
subquery?
(TCO 9) If the _________ clause of the UPDATE command is
omitted, then all the rows in the specified table will be changed.
(TCO 9) Which of the following is not a valid SQL command?
(TCO 9) Based on the contents of the PROMOTION table, which of
the following commands will delete only the row for the Free
Bookmark from the table?
(TCO 8) In using group functions we cannot place a group function in
a WHERE clause. Explain how the WHERE clause and HAVING
clause similar and why you can use the HAVING with a group
function but not a WHERE clause.
===============================================
CIS 336 Week 2 Quiz (New)
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CIS 336 Week 2 Quiz
Question 1. (TCO 1) Raw facts, such as a telephone
number, a birth date, and a customer name, are also referred to as
_____
Question 2. (TCO 1) The DBMS allows you to extrapolate
information from your data by using a _____
Question 3. (TCO 1) A database row (record) consists of
_____
Question 4. (TCO 2) In Oracle, a _____ is automatically
constrained to be unique and not null.
Question 5. (TCO 2) A verb associating two nouns in a
business rule usually translates to a(n) ___ in the data model.
Question 6. (TCO 2) In a relationship, when a primary key
from one table is also defined in a second table, the field is referred to
as a _____ in the second table.
72. Question 7. (TCO 2) In a relational database, each table
must have _____
Question 8. (TCO 5) The product of a logical model is the
entity relationship diagram, also known as a _____
===============================================
CIS 336 Week 3 Quiz (New)
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CIS 336 Week 3 Quiz
Question 1. (TCO 3) When designing a database, you
should _____
Question 2. (TCO 3) A table that is in 1NF and includes no
partial dependencies only is said to be in _____
Question 3. (TCO 3) (TCO 3) A table is not in 1NF if
_______________.
Question 4. (TCO 9) All of following are examples of
DML commands except _____
73. Question 5. (TCO 4) Which of the following is not
considered a database object?
Question 6. (TCO 4) In Oracle, the DEFAULT constraint
is used to _____
Question 7. (TCO 4) The SQL command that lets you save
your work to disk, is _____
Question 8. (TCO 9) Which of the following SQL
statements would insert a line of data into the DEVRY table and
supply a NULL value for the Student_city column?
===============================================
CIS 336 Week 4 Quiz (New)
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CIS 336 Week 4 Quiz
Question 1. (TCO 7) Which of the following types of
columns will automatically right-align the data when it is displayed?
Question 2. (TCO 7) Which of the following symbols can
be used to denote that any and all characters following the sign are
eligible when used with LIKE?
Question 3. (TCO 7) Based upon the contents of the
BOOKS table shown below, which of the following is a valid SQL
statement?
74. Question 4. (TCO 7) Which of the following operators
would be most appropriate to determine whether or not the retail price
of a book is at least $24.00?
Question 5. (TCO 7) Based upon the contents of the
BOOK_ORDER table shown below, which of the following SQL
statements will list all orders placed by customer# 1020 that have not
yet been shipped?
Question 6. (TCO 7) Based upon the contents of the
BOOK_ORDER table shown below, which of the following queries
will display all orders shipped between April 4, 2003 and April 5,
2003?
Question 7. ((TCO 7) The ____ comparison operator is
used to search for values that are not NULL.
Question 8. (TCO 7) You want to write a SQL query that
lists all employees in the EMP table whose last names in the
EMP_LNAME column start with Smith, including values such as
Smithfield. What is the correct statement?
===============================================
CIS 336 Week 5 Quiz (New)
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CIS 336 Week 5 Quiz
75. Question 1. (TCO 8) The ____ set operator in SQL
combines rows from two queries and returns only the values that are
common between the two sets.
Question 2. (TCO 8) Which SQL function converts a value
to a particular string format?
Question 3. (TCO 8) Based upon the contents of the
BOOK_ORDER table shown below, which of the following SQL
statements will display only those orders shipped to the zip code zone
that begins with 323?
Question 4. (TCO 8) Oracle’s pseudo table used only for
cases where a table is not really needed is _____
Question 5. (TCO 7) Using the BOOK_CUSTOMER and
BOOK_ORDER tables shown below for reference, which SQL
statement will return the first and last name of each customer who's
order has not yet shipped?
Question 6. (TCO 7) A table alias or qualifier cannot be
assigned in the FROM clause of which type of join?
Question 7. (TCO 7) A(n) ____ join returns not only the
rows matching the join condition (that is, rows with matching values
in the common columns) but also the rows with unmatched values.
Question 8. (TCO 7) Which statement will display the date
in this format:
===============================================
CIS 336 Week 6 Quiz (New)
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76. CIS 336 Week 6 Quiz
Question 1. (TCO 6) Which of the following keywords can
be used to change the size, datatype, or default value of an existing
column?
Question 2. (TCO 9) If the _____ clause of the UPDATE
command is omitted, then all the rows in the specified table will be
changed.
Question 3. (TCO 6) Which of the following commands
will increase the size of the CITY column in the CUSTOMERS table
from 12 to 20 and increase size of the LASTNAME column from 10
to 14?
Question 4. (TCO 8) Based upon the contents of the
BOOKS table shown below, which of the following SQL statements
will return the number of different categories contained in the table?
Question 5. (TCO 9) Which of the following is not a valid
SQL command?
Question 6. (TCO 8) Based on the contents of the BOOKS
table shown below, which of the following SQL statements will return
the total profit generated by books in the COOKING category?
Question 7. (TCO 8) Before the COMMIT command is
used, you can retrieve deleted records by using the _____ command.
Question 8. (TCO 8)Based on the contents of the
BOOK_ORDER table shown below, which of the following SQL
statements will list the order number and customer number for the
most recent orders in the system?
===============================================