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NULLIF function in SQL SERVER

It accepts the two values, if both the values are matched then it will return NULL otherwise it will return first value.

Examples-1:

Declare @FisrtName varchar(100),@LastName varchar(100)
Set @FisrtName='Rakesh'
Set @LastName ='Rakesh'
Select NULLIF(@FisrtName,@LastName) As[NULLIF]





Example-2:

Declare @FisrtName varchar(100),@LastName varchar(100)
Set @FisrtName='Rakesh'
Set @LastName ='Kalluri'
Select NULLIF(@FisrtName,@LastName) As[NULLIF]




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