01 qmds2005 session01

622 views

Published on

Published in: Technology
0 Comments
3 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
622
On SlideShare
0
From Embeds
0
Number of Embeds
95
Actions
Shares
0
Downloads
0
Comments
0
Likes
3
Embeds 0
No embeds

No notes for slide
  • This session covers chapter 1 and first section 1 of chapter 2 of the Student Guide.
  • Explain the components of SQL Server as follows: Database Engine: Provides support to store, query, process, and secure data on the database server Integration Services: Allow you to gather and integrate data from various disparate data sources available in an organization Analysis Services: Help in data analysis in a business intelligence application Reporting Services: Provide support to generate comprehensive reports on data in database engine or in data warehouse
  • Emphasize on the fact that most DBMS have created customized versions of the SQL language. For example, Transact-SQL (T-SQL) is a scripting language used on the SQL Server for programming. Alternatively, PL-SQL is used for programming in Oracle. T-SQL confirms to the ANSI SQL-92 standard published by ANSI and ISO in the year 1992.
  • When teaching this topic, only introduce the tools and tell the students about the utility of each tool. You can describe the different components of the SQL Server Management Studio while giving the first demonstration of Chapter 2. After this chapter, you need to teach the first section of Chapter 2 in the same session.
  • NOTE: All the chapters in this book include SQL queries and demos to explain concepts. You need to demonstrate these queries using the user account, Kim, Robert, or Angela, who does not have administrative privileges. In the examples, where you need to use administrative rights, specific inputs have been given for the faculty. Explain the students that SQL Server 2005 consists of many data types. Int, float, char, and varchar are some of the most commonly used data types. In addition, explain all the four data types to the students and ask them to read in the SG about other data types. FAQs Question: Difference between char and varchar? Answer: Char has a fixed length of characters to store whereas it is flexible in case of varchar.
  • NOTE: All the chapters in this book include SQL queries and demos to explain concepts. You need to demonstrate these queries using the user account, Kim, Robert, or Angela, who does not have administrative privileges. In the examples, where you need to use administrative rights, specific inputs have been given for the faculty. Explain the students that SQL Server 2005 consists of many data types. Int, float, char, and varchar are some of the most commonly used data types. In addition, explain all the four data types to the students and ask them to read in the SG about other data types. FAQs Question: Difference between char and varchar? Answer: Char has a fixed length of characters to store whereas it is flexible in case of varchar.
  • Explain the students that while querying the data from the database, you need to modify the heading of the columns, add more values to the output, or merge the output of various columns to improve the readability. Execute the following queries to explain the concept: User-defined headings: 1. SELECT 'Department Number'= DepartmentID, ' Department Name'= Name FROM HumanResources.Department 2. SELECT DepartmentID 'Department Number', Name ' Department Name' FROM HumanResources.Department 3. SELECT DepartmentID as 'Department Number', Name as ' Department Name' FROM HumanResources.Department Literals: SELECT EmployeeID, 'Designation: ', Title FROM HumanResources.Employee Concatenation Operators: SELECT Name + ' department comes under ' + GroupName + ' group' AS Department FROM HumanResources.Department
  • Explain the students that arithmetic operators are used to perform mathematical operations, such as addition, subtraction, division, and multiplication, on numeric columns or on numeric constants. Additional Inputs Operator precedence levels are as follows: for arithmetic operators, the precedence is ‘*’, ‘/’, ‘,’, ‘%’, ‘-’, ‘+’. The precedence levels can be changed by the use of ‘( )’. Example SELECT EmployeeID, Rate, Per_Day_Rate = 8 * Rate FROM HumanResources.EmployeePayHistory
  • Explain the students that similar to retrieving the selected columns you can also retrieve selected rows from the table using WHERE clause. Stress on writing the SQL statement in separate lines in the Query Pane of Microsoft SQL Server Management Studio. It becomes easy to read and debug. Example: SELECT * FROM HumanResources.Department WHERE GroupName = 'Research and Development'
  • Explain the students that you can use any of the three comparison operators with WHERE clause to create conditions. Example: SELECT EmployeeID, NationalIDNumber, Title, VacationHours FROM HumanResources.Employee WHERE VacationHours > 20
  • Explain the students that multiple conditions can be used to retrieve data from a table, and you can do this by using the logical operators. Example: (OR) SELECT * FROM HumanResources.Department WHERE GroupName = 'Manufacturing' OR GroupName = 'Quality Assurance' Example: (AND) SELECT * FROM HumanResources.Employee WHERE Title = 'Production Technician - WC60' AND MaritalStatus = 'M‘ Example: (NOT) SELECT * FROM HumanResources.Department WHERE GroupName = 'Manufacturing' OR NOT GroupName = 'Quality Assurance'
  • Explain the students that you can use range operators to retrieve selected rows which falls within a particular range. Example: (Between) SELECT EmployeeID, VacationHours from HumanResources.Employee WHERE VacationHours BETWEEN 20 AND 50 Example: (Not Between) SELECT EmployeeID,VacationHours FROM HumanResources.Employee WHERE VacationHours NOT BETWEEN 40 AND 50
  • Example: (IN) SELECT EmployeeID,Title, LoginID FROM HumanResources.Employee WHERE Title IN ('Recruiter', 'Stocker') Example: (NOT IN) SELECT EmployeeID,Title, LoginID FROM HumanResources.Employee WHERE Title NOT IN ('Recruiter', 'Stocker')
  • Wildcard Characters Mention that if a particular character pattern is being searched for, the wildcard characters can be used along with the LIKE keyword. Additional Input A wildcard is a special character such that you can use to represent one or more characters. Any character or set of characters can replace a pattern matching character. Example: (Using %) SELECT * FROM HumanResources.Department WHERE Name LIKE 'Pro%‘ Example: (Using _) SELECT * FROM HumanResources.Department WHERE Name LIKE 'Sale_‘ Mention that IS NULL or NOT NULL are unknown value operators.
  • Explain the students that when the ORDER BY clause is used, only the output of the SELECT statement is sorted. Stress on that the physical data in the table remains as it is, only the output is sorted. In addition, mention that the default sort order is ASC. Additional Inputs Image, text, and ntext columns cannot be used in an ORDER BY clause. Example: (ASC) SELECT DepartmentID, Name FROM HumanResources.Department ORDER BY Name ASC
  • Stress that the TOP keyword is used to retrieve the top few records, as they exist in the table. If you require the top few records with respect to a sort order of a particular column, then you need to include the ORDER BY keywords in the SELECT statement. Additional Input Unlike previous versions of Microsoft SQL Server, now TOP keyword can also be used with DML statements, such as UPDATE or DELETE. Example: SELECT TOP 3 * FROM HumanResources.Employee WHERE HireDate >= '1/1/98' AND HireDate <= '12/31/98' ORDER BY SickLeaveHours ASC
  • Explain the students that when you use more than one column with the DISTINT clause, SQL Server displays you the unique matches of these columns. Additional Inputs When using DISTINCT, only the name of a column can be used, an arithmetic expression gives an error. Example: SELECT DISTINCT Title FROM HumanResources.Employee WHERE Title LIKE 'PR%'
  • Explain the students that in such cases, we can not use the normal WHERE clause.
  • At the end of this demo, the student will learn how to retrieve data from a table. Pre requisites for the demo: To perform the demos of the book, you need to use any of the users, Angela, Robert, or Kim, created at the time of installation.
  • You can summarize the session by running through the summary given in SG. In addition, you can also ask students summarize what they have learnt in this session.
  • You can summarize the session by running through the summary given in SG. In addition, you can also ask students summarize what they have learnt in this session.
  • You can summarize the session by running through the summary given in SG. In addition, you can also ask students summarize what they have learnt in this session.
  • You can summarize the session by running through the summary given in SG. In addition, you can also ask students summarize what they have learnt in this session.
  • 01 qmds2005 session01

    1. 1. Querying and Managing Data Using SQL Server 2005Rationale Aspiring Database Developers should be able to efficiently query and maintain databases. This module will help students learn the Structured Query Language (SQL) to query and manage databases. Ver. 1.0 Session 1 Slide 1 of 35
    2. 2. Querying and Managing Data Using SQL Server 2005Objectives In this session, you will learn to: Appreciate SQL Server 2005 as a database server Identify the SQL Server 2005 tools Retrieve data Ver. 1.0 Session 1 Slide 2 of 35
    3. 3. Querying and Managing Data Using SQL Server 2005Role of a Database Server Business applications consist of three elements: The user interface or the presentation element The application logic or the business rule element The data storage or the data management element The application architectures can be categorized as: Single-tier architecture Two-tier architecture Three-tier architecture N-tier architecture Ver. 1.0 Session 1 Slide 3 of 35
    4. 4. Querying and Managing Data Using SQL Server 2005SQL Server 2005 Components SQL Server 2005 consists of the following components. Database Engine Service Full-Text Notification Replication Broker Search Services Integration Services Analysis Services Reporting Services Ver. 1.0 Session 1 Slide 4 of 35
    5. 5. Querying and Managing Data Using SQL Server 2005SQL Server 2005 Components (Contd.) Microsoft SQL Server 2005 is integrated with the .NET Framework. .NET Framework Database Engine Service Full-Text Notification Replication Broker Search Services Integration Services Analysis Services Reporting Services Ver. 1.0 Session 1 Slide 5 of 35
    6. 6. Querying and Managing Data Using SQL Server 2005Just a minute Which of the following services of SQL Server 2005 allows you to implement message-based communication? 1. Full-text search 2. Service Broker 3. Notification services 4. Replication Answer: 2. Service Broker Ver. 1.0 Session 1 Slide 6 of 35
    7. 7. Querying and Managing Data Using SQL Server 2005Just a minute Which of the following services of SQL Server 2005 allows you to gather and integrate data from disparate data sources in an organization? 1. Analysis services 2. Integration services 3. Notification services 4. Replication Answer: 2. Integration services Ver. 1.0 Session 1 Slide 7 of 35
    8. 8. Querying and Managing Data Using SQL Server 2005Features of SQL Server 2005 SQL Server 2005 provides the following features: Built-in support for Extensible Markup Language (XML) data CLR integration Scalability Service-oriented architecture Support for Web services High level of security High availability Support for data migration and analysis Ver. 1.0 Session 1 Slide 8 of 35
    9. 9. Querying and Managing Data Using SQL Server 2005Structured Query Language (SQL) SQL is the core language used to: Store data Retrieve and manipulate data Modify data SQL can be categorized as: Data Definition Language (DDL) Data Manipulation Language (DML) Data Control Language (DCL) Data Query Language (DQL) Ver. 1.0 Session 1 Slide 9 of 35
    10. 10. Querying and Managing Data Using SQL Server 2005Just a minute Which of the following features of SQL Server 2005 allow the developers to implement their programming logic in any language supported by the .NET framework? 1. Support for data migration 2. High availability 3. CLR integration 4. Scalability Answer: 3. CLR integration Ver. 1.0 Session 1 Slide 10 of 35
    11. 11. Querying and Managing Data Using SQL Server 2005Identifying SQL Server 2005 Tools SQL Server 2005 provides the following tools: SQL Server Management Studio SQL Server Business Intelligence Development Studio Database Engine Tuning Advisor SQL Server Configuration Manager Ver. 1.0 Session 1 Slide 11 of 35
    12. 12. Querying and Managing Data Using SQL Server 2005Just a minute Which of the following tools of SQL Server 2005 allow starting and stopping the full-text search? 1. SQL Server Management Studio 2. Business Intelligence Development Studio 3. Database Engine Tuning Advisor 4. SQL Server Configuration Manager Answer: 4. SQL Server Configuration Manager Ver. 1.0 Session 1 Slide 12 of 35
    13. 13. Querying and Managing Data Using SQL Server 2005Identifying Data Types Data types: Specify the type of data that an object can contain Commonly used by SQL Server are: int float char varchar Ver. 1.0 Session 1 Slide 13 of 35
    14. 14. Querying and Managing Data Using SQL Server 2005Retrieving Specific Attributes Specific attributes can be retrieved by specifying selected column names in the SELECT statement. Syntax: SELECT [ALL | DISTINCT] select_column_list [INTO [new_table_name]] FROM {table_name | view_name} [WHERE search_condition] [GROUP BY group_by_expression] [HAVING search_condition] [ORDER BY order_expression [ASC | DESC]] [COMPUTE {{ AVG | COUNT | MAX | MIN | SUM } ( expression ) } [,...n ] [ BY expression [ ,...n ] ] Let’s see how… Ver. 1.0 Session 1 Slide 14 of 35
    15. 15. Querying and Managing Data Using SQL Server 2005Retrieving Specific Attributes (Contd.) Display of the result set can be customized using: User-defined headings Literals Concatenation operators Let’s see how… Ver. 1.0 Session 1 Slide 15 of 35
    16. 16. Querying and Managing Data Using SQL Server 2005Retrieving Specific Attributes (Contd.) Column values can be calculated using arithmetic operators: + (for addition) - (for subtraction) / (for division) * (for multiplication) % (for modulo) Let’s see how… Ver. 1.0 Session 1 Slide 16 of 35
    17. 17. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows Selected rows can be retrieved using the WHERE clause in the SELECT statement. Let’s see how… Ver. 1.0 Session 1 Slide 17 of 35
    18. 18. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows (Contd.) Comparison operators: Can be used with WHERE clause to create conditions Supported by SQL Server are: • = (equal to) • > (greater than) • < (less than) and many more Syntax: SELECT column_list FROM table_name WHERE expression1 comparison_operator expression2 Let’s see how… Ver. 1.0 Session 1 Slide 18 of 35
    19. 19. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows (Contd.) Logical operators: Can be used with SELECT statement to retrieve records based on one or more matching conditions Supported by SQL Server are: • AND • OR • NOT Syntax: SELECT column_list FROM table_name WHERE conditional_expression1 {AND/OR} [NOT] conditional_expression2 Let’s see how… Ver. 1.0 Session 1 Slide 19 of 35
    20. 20. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows (Contd.) Range operators: Can be used with SELECT statement to retrieve records based on a range Supported by SQL Server are: • BETWEEN • NOT BETWEEN Syntax: SELECT column_list FROM table_name WHERE expression1 range_operator expression2 AND expression3 Let’s see how… Ver. 1.0 Session 1 Slide 20 of 35
    21. 21. Querying and Managing Data Using SQL Server 2005Just a minute Which of the following are logical operators? 1. BETWEEN and NOT BETWEEN 2. AND, OR, and NOT 3. + and % 4. > and < Answer: 2. AND, OR, and NOT Ver. 1.0 Session 1 Slide 21 of 35
    22. 22. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows (Contd.) IN keyword: Allows the selection of values that match any one of the values in a list NOT IN keyword: Restricts the selection of values that match any one of the values in a list Syntax: SELECT column_list FROM table_name WHERE expression list_operator (‘value_list’) Let’s see how… Ver. 1.0 Session 1 Slide 22 of 35
    23. 23. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows (Contd.) LIKE keyword: Can be used to search for character string, date, or time values that match a specified pattern Uses wildcard characters like *, % to perform pattern match Let’s see how… • NULL values: Can be retrieved by using IS NULL keyword with SELECT statement Syntax: SELECT column_list FROM table_name WHERE column_name unknown_value_operator Let’s see how… Ver. 1.0 Session 1 Slide 23 of 35
    24. 24. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows (Contd.) ORDER BY clause: Can be used with the SELECT statement to display records in a specific order Displays record in ascending or in descending order Syntax: SELECT select_list FROM table_name [ORDER BY order_by_expression [ASC|DESC] [, order_by_expression [ASC|DESC]…] Let’s see how… Ver. 1.0 Session 1 Slide 24 of 35
    25. 25. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows (Contd.) TOP keyword: Can be used with the SELECT statement to retrieve only the first set of rows, which can be either a number or a percent of rows Syntax: SELECT [TOP n [PERCENT]] column_name [,column_name…] FROM table_name WHERE search_conditions [ORDER BY [column_name[,column_name…] Let’s see how… Ver. 1.0 Session 1 Slide 25 of 35
    26. 26. Querying and Managing Data Using SQL Server 2005Retrieving Selected Rows (Contd.) DISTINCT keyword: Can be used with the SELECT statement to eliminate duplicate rows Syntax: SELECT [ALL|DISTINCT] column_names FROM table_name WHERE search_condition Let’s see how… Ver. 1.0 Session 1 Slide 26 of 35
    27. 27. Querying and Managing Data Using SQL Server 2005Just a minute Write a query to display all the records of the ProductModel table where the product name begins with HL. Answer: SELECT * FROM Production.ProductModel WHERE Name LIKE HL% Ver. 1.0 Session 1 Slide 27 of 35
    28. 28. Querying and Managing Data Using SQL Server 2005Demo: Retrieving Data Problem Statement: You are a database developer of AdventureWorks, Inc. The AdventureWorks database is stored on the SQLSERVER01 database server. The details of the sales persons are stored in the SalesPerson table. The management wants to view the details of the top three sales persons who have earned a bonus between $4,000 and $6,000. How will you generate this report? Ver. 1.0 Session 1 Slide 28 of 35
    29. 29. Querying and Managing Data Using SQL Server 2005Demo: Retrieving Data (Contd.) Solution: To solve the preceding problem, you need to perform the following tasks: 1. Create a query. 2. Execute the query to generate the report. Ver. 1.0 Session 1 Slide 29 of 35
    30. 30. Querying and Managing Data Using SQL Server 2005Summary In this session, you learned that: A business application can have three elements: user interface, business logic, and data storage. A database server is used to store and manage database in a business application. SQL Server 2005 consists of the following four core components: database engine, integration services, analysis services, and reporting services. The database engine provides support to store, query, process, and secure data on the database server. Integration services allow you to gather and integrate data from disparate data sources at a common location in a consistent format. Ver. 1.0 Session 1 Slide 30 of 35
    31. 31. Querying and Managing Data Using SQL Server 2005Summary (Contd.) Analysis services provide data mining solutions that help in data analysis. Reporting services provide support to generate comprehensive reports on the data stored in the database engine or the data warehouse. Microsoft SQL Server 2005 is integrated with the .NET Framework. The .NET Framework is an environment used to build, deploy, and run business applications through various programming languages. The .NET Framework consists of three components: development tools and languages, base class library, and CLR. Ver. 1.0 Session 1 Slide 31 of 35
    32. 32. Querying and Managing Data Using SQL Server 2005Summary (Contd.) SQL Server 2005 provides the following benefits: • Built-in support for XML • CLR integration • Scalability • Service-oriented architecture • Support for Web services • High level of security • High availability • Support for data migration and analysis SQL includes: • DDL: To create and manage database objects • DML: To store and manage data in database objects • DCL: To allow or deny access to database objects • DQL: To query data from the database objects Ver. 1.0 Session 1 Slide 32 of 35
    33. 33. Querying and Managing Data Using SQL Server 2005Summary (Contd.) SQL Server 2005 provides the following tools to improve the efficiency of the database developers and manage the server: • SQL Server Management Studio • SQL Server Business Intelligence Management Studio • Database Engine Tuning Advisor • SQL Server Configuration Manager Data can be retrieved from a database by using the SELECT statement. Data of all the columns of a table can be retrieved by specifying * in the select query. Data that has to be retrieved based on a condition is specified by adding the WHERE clause. Literals and user-defined headings are added to change the display. The concatenation operator is used to concatenate a string expression. Ver. 1.0 Session 1 Slide 33 of 35
    34. 34. Querying and Managing Data Using SQL Server 2005Summary (Contd.) – Arithmetic operators are used to perform mathematical operations. – Comparison operators test the similarity between two expressions. – Logical operators are used in the SELECT statement to retrieve records based on one or matching conditions. The logical operators are AND, OR, and NOT. – The Range operator retrieves data based on the range. There are of two types of range operators, BETWEEN and NOT BETWEEN. – The IN keyword allows the selection of values that match any one of the values in a list. – The NOT IN keyword restricts the selection of values that match any one of the values in a list. Ver. 1.0 Session 1 Slide 34 of 35
    35. 35. Querying and Managing Data Using SQL Server 2005Summary (Contd.) The LIKE keyword is used to specify the pattern search. The IS NULL keyword is used to retrieve missing values. The ORDER BY clause is used to retrieve data in a specific order. The TOP keyword retrieves only the first set of rows, which can either be a number or a percent of rows that will be returned from a query result. The DISTINCT keyword eliminates duplicate rows. Ver. 1.0 Session 1 Slide 35 of 35

    ×