Sql server ___________session_20(ddl triggers)
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The document discusses different types of triggers in SQL Server including: - DDL triggers that fire on database events like create, alter, and drop operations. - INSTEAD OF triggers that intercept DML operations like DELETE and allow modifying or replacing the action. - Nested triggers where one trigger firing can initiate another trigger. - Disabling triggers on a specific table or for all triggers.
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![CREATETRIGGER [name of
trigger]
ON [scope (database|server)]
FOR [event]
As
--Trigger definition here…](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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package hw4p1;
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{
System.out.println(\"t\");
}
} while (!arrDate[3].equalsIgnoreCase(\"w\") && !arrDate[3].equalsIgnoreCase(\"b\") &&
!arrDate[3].equalsIgnoreCase(\"t\"));
in.close();
String Date = arrDate[0] +.
A Tour to MySQL Commands
A complete list of MySQL commands with little description.
These are the available commands used for administration.
This was prepared while I was in CSIT VII Semester and would like to share with
you.
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INSERCION DE REGISTROS DESDE VISUAL.NET A UNA BD DE SQL SERVER
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User Defined Aggregation in Apache Spark: A Love Story
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1sequences and sampling. Suppose we went to sample the x-axis from X.pdf
1sequences and sampling. Suppose we went to sample the x-axis from Xmin to Xmax using a
step size of step
A)Draw a picture of what is going on.
B) Write a expression for n the total number of samples involved (in terms of Xmin, Xmax and
step)
C) Write out the sequence of x-samples
D) Write a direct and general expression for xi that captures the sequence
E) Write a recursive expression for the sequence
F) Write a program to compute and store the x-samples over the range -5x5 using a step size of
0.1 do everything in main ()
2 . We talked about the following string functions that are available in C (as long as you include
string.h):
int strlen(char str[])
void strcpy(char str1[], char str2[])
void strcat(char str1[], str2[])
Write your own versions of these functions; for example: int paul_strlen(int char str[]). Hint: for
your version of the strlen function, start at the first character in the array and keep counting until
you find the ‘\\0’ character (use a while loop for this). Note: Use your version of the strlen
function in the strcpy and strcat functions.
9. We want to insert a number into an array.
(a) Formulate the problem mathematically with two sequences: x and y. (b) Write a function of
the form:
insertNumIntoArray(int n, int array[], int num, int index)
The function inserts num into the array at the specified index. The rest of the array then follows.
For example, if num = 9 and index = 3 and array = [7 2 8 8 3 1 2] then the function will produce:
array = [7 2 8 9 8 3 1 2]
Note: assume that array is properly dimensioned to have at least 1 extra space for storage.
10. Repeat #2 by for the delete operation; that is, we want to delete a single element (at a
specified index) from an array; for example, suppose index = 3 and array = [50 70 10 90 60 20],
then the result will be
array: [50 70 10 60 20]
11. Repeat #2 by for an insert operation where we are inserting several values into the array. The
function should be of the form:
int insertArrayIntoArray(int n, int inArray[],
int nInsert, int insertArray[], int outArray[], int index)
The dimension of outArray is returned (explicitly). For example:
inArrayarray: [7 2 8 6 3 9]
insertArray: [50 60 70]
index: 2
outArray: [7 2 50 60 70 8 6 3 9]
Assume that outArray is large enough to hold all n + nInsert values.
Solution
#include
//Simulates strlen() library function
int paul_strlen(char str[])
{
int l;
for(l = 0; str[l] != \'\\0\'; l++) ;
return l;
}
//Simulates strcpy() library function
void paul_strcpy(char str1[], char str2[])
{
int c;
for(c = 0; str1[c] != \'\\0\'; c++)
str2[c] = str1[c];
str2[c] = \'\\0\';
printf(\"\ Original String: %s\", str1);
printf(\"\ Copied String: %s\", str2);
}
//Simulates strcat() library function
void paul_strcat(char str1[], char str2[])
{
int i, j;
for(i = 0; str1[i] != \'\\0\'; i++) ;
for (j = 0; str2[j] != \'\\0\'; i++, j++)
{
str1[i] = str2[j];
}
str1[i] = \'\\0\';
printf(\"\ Concatenated String: %s\", str1);
}
int main()
{
char data1[20], data2[20];
pri.
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Sql server ___________session_18(stored procedures)
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Sql server ___________session_17(indexes)
This document discusses different types of indexes in databases and how to create them. It explains that indexes improve data retrieval speed by organizing data in a structure that allows faster searches. The main types covered are clustered indexes, which physically organize data on disk; non-clustered indexes, which store a copy of the indexed column values and pointers to rows; and full-text indexes, which support complex searches of text data. The document provides step-by-step instructions for creating indexes using the SQL Server user interface.
Sql server ___________session_16(views)
A view is a virtual table that displays data from one or more underlying tables. Views can be used to restrict access to rows and columns, join data from multiple tables, and present aggregate information. Views do not actually store data but derive rows and columns from the underlying tables when queried. Views can be created, altered, and dropped using SQL statements. Schema binding locks the referenced tables to prevent changes while encryption hides the view definition from users.
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Data integrity ensures accurate and consistent data in a database through various constraints. Entity integrity is enforced by primary keys and unique constraints. Domain integrity is enforced by foreign keys, check constraints, default values, and data types. Referential integrity is enforced by foreign keys and ensures consistency between related data in different tables. Common constraints include primary keys, unique constraints, foreign keys, null constraints, default constraints, and check constraints.
Sql server ___________session_11-12(joins)
The document discusses different types of joins in SQL: inner joins, outer joins (left, right, full), and self joins. An inner join returns rows when there is a match between both tables based on the join condition. Outer joins return all rows from one table, even if there are no matches in the other table. A self join matches records within the same table. The document provides SQL syntax examples for each type of join.
Sql server ___________session_10(group by clause)
The GROUP BY clause is used to organize rows into groups and can be used with clauses like WHERE, HAVING, and operators like ROLLUP and CUBE. GROUP BY works with WHERE to restrict rows before grouping, groups null values separately, and ALL includes groups that don't meet search conditions. ROLLUP generates subtotals and totals, while CUBE shows aggregates for all column value combinations including totals.
Sql server ___________session_1-intro
The document discusses key concepts in relational database management systems (RDBMS). It defines what a database and DBMS are, and explains that a DBMS provides tools to define, create and maintain databases and control access. It also outlines different database models like hierarchical, network and relational models. The relational model organizes data into tables with rows and columns and handles relationships between tables. The document then discusses core components of RDBMS like tables, rows, columns, primary keys and foreign keys.
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This document discusses several new features in SQL Server 2008 related to data manipulation language (DML) and XML data types, including table value constructors, table-valued parameters, the MERGE statement, enhanced GROUP BY functionality using ROLLUP, CUBE, and GROUPING SETS, and improved XML data type handling. It provides examples and explanations of the syntax and usage for each feature.
Sql server ___________session 2(sql 2008)
This document describes new features in SQL Server 2008 related to variables, data types, and Transact-SQL language enhancements. It discusses new data types such as date, time, datetime2, and datetimeoffset. It also covers sparse columns, which reduce storage for columns with many null values. The document provides examples and syntax for declaring variables of different data types, and explains features like improved date and time functions.
Sql server ___________session 1(sql 2008)
The document discusses the new features of SQL Server 2008. It describes enhancements to the data platform, including support for diverse data sources and spatial data. New features were added to SQL Server Analysis Services, Integration Services, and Reporting Services to improve business intelligence. The SQL Server 2008 Management Studio saw improvements like IntelliSense, multi-server querying, object searching, and enhanced monitoring tools.
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- 3. Create table back_up ( actions varchar(20), action_date datetime ) create trigger ddl_trg on database for create_table(,alter_table,drop_table) as declare @ac varchar(20); SELECT top 1 @ac = name FROM sys.tables insert into back_up values(@ac+' table has been created', getdate()) print 'table created';
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