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Thursday 10 January 2013

use top clause with update delete statements in SQL Server

Before write query to use top keyword or clause with update and delete statements we need to design table UserInformation in database like as shown below

Column Name
Data Type
Allow Nulls
UserId
Int (set Identity=true)
No
UserName
varchar(50)
Yes
Location
Varchar(50)
Yes
Once table created enter some dummy data like as shown below
Check below methods to use Top keyword or clause with update and delete statements
Top keyword with Update Statement
Syntax to use top keyword with update statement
UPDATE TOP(N) Table1 SET Column1='somevalue'
Example
UPDATE TOP(2) UserInformation SET UserName='test2'
Once we run above query our table UserInformation will contain data like as shown below
Output
Top keyword with delete statement
Syntax to use top keyword with delete statement
DELETE TOP(N) FROM Table1
Example
DELETE TOP(2) FROm UserInformation
Once we run above query our table UserInformation will contain data like as shown below

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