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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]

1 . ROW_NUMBER () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns the sequantial number of a row within the a partition of result set at 1 for the first row of the each partition. 2. RANK () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns rank for rows within the partition of result set. 3. DENSE_RANK () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns rank for rows within the partition of result set.With out any gaps in the ranking. 4. NTILE ( INTEGER_EXPRESSION ) OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Distributes the rows in an ordered partition into a specified number of groups. Examples: --create Employee table create table Employee (                 EmpId int identity ( 1 , 1 ) primary key ,              ...

OFFSET -FETCH option is filltering option that like ,top you can use fillter the data based on number of rows. Difference between TOP and OFFSET- FETCH Is OFFSET-FETCH it skippes the rows.In TOP Option it will not skip. The OFFSET-FETCH option is rigth after the order by . The order by is required when OFFSET-FETCH option includes. The OFFSET-FETCH option intorduced in SQL-SERVER 2012. We can use OFFSET-FECTH option implement pagenation. --create Employee table create table Employee (                 EmpId int identity ( 1 , 1 ) primary key ,                 FirstName varchar ( 100 ),                 LastName varchar ( 100 ),                 JoinDate ...

We now that merge statement in SQL SERVER. With Merge statement we can merge the data from Source table into Target table. In the Last article we have already seen about Merge Statement .   These articles we will work around merge statement over xml data type. We know that xml data type SQL SERVER. XML Data type is used to storing xml data used Bulk Insert Data into SQL Tables. Example: --Create Student Table if object_id ( 'Student' ) is null create table Student ( id int identity ( 1 , 1 ) , Name varchar ( 20 ), Marks int ) Declare Xml Data Type and Assign Some Xml Data. Declare @Data xml set @Data = '<Root> <Student> <Name>Rakesh</Name> <Marks>80</Marks> </Student> <Student> <Name>Mahesh</Name> <Marks>90</Marks> </Student> <Student> <Name>Gowtham</Name...