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SQL FUNCTION: -
Function in a database can be defined as the code segment consisting of a logical group of SQL statements which takes some input arguments (if required), run in a sequential order and returns the output either in the form of a single va...
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Introduction
Triggers can be defined as the database objects which perform some action for automatic execution whenever users try to do execute data modification commands (INSERT, DELETE and UPDATE) on the specified tables. Triggers are bound to specifi...
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Output Clause:- The SQL SERVER 2005 gives us an Output Clause which gives us the information about each row affected by the Insert, Update , Delete and Merge statement. It is more useful than @@scope_Identity and @@Identity column since these global varia...
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Common table expression (CTE):- Common table expression or CTE can be described as the temporary, named record set return by the execution of the query (insert, delete, update, select or update view statement). It is not stored as an object in the databa...
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Table variable:- SQL Server provides an variable known as table variable which is used to store data in a similar way as we store data in physical tables but with some limitations. Like other SQL variable, it is also declare with the help of the Declare k...
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Local temporary table:- Local temporary table is created in the tempdb and it is visible to the current user's session only. It remains exists till the current user session is connected. Once the user connection is disconnected it gets destroyed. Since t...
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Global temporary table:- Global temporary table is created in the tempdb and it is visible to all other sessions as well. Global temporary tables are only destroyed when the current user disconnected and all the sessions referring to it closed. It means...
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To change the collation of an database following commands can be used:
ALTER DATABASE [database name] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
ALTER DATABASE [database name] COLLATE Newcollation
ALTER DATABASE [database name] SET MULTI_USER
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To rename a column in a SQL Table following command can be reused:
SP_RENAME 'old table name', 'New table name'
For example, if we want to rename the table from employee to employeemaster, following command can be used.
SP_RENAME 'employee', 'employee...
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Different Types of Sql Statements:-
DMLDML is abbreviation of Data Manipulation Language. It is used to retrieve, store, modify, delete, insert and update data in database.
Examples: SELECT, UPDATE, INSERT statements
Select :- This Sql Statement is used t...
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