How to use rank function in SQL Server ?

The ROW_NUMBER () function in SQL Server returns the sequential number of a row within a partition of a result set, starting at 1 for the first row in each partition.

The RANK() function in SQL Server returns the position of a value within the partition of a result set, with gaps in the ranking where there are ties.

The DENSE_RANK() function in SQL Server returns the position of a value within the partition of a result set, leaving no gaps in the ranking where there are ties.

The NTILE() function in SQL Server return distributes the rows in an ordered partition into a specified number of groups.

Example

CREATE TABLE Students(

Stud_ID INT IDENTITY(1,1),

Stud_Name VARCHAR(100),

Stud_Mark INT

)

INSERT INTO Students(Stud_Name,Stud_Mark)

VALUES('a',60),

('b',94),

('c',70),

('d',63),

('e',60),

('f',60),

('g',94),

('h',47),

('i',70),

('j',60)

SELECT Stud_ID,Stud_Name,Stud_Mark,

ROW_NUMBER() OVER (ORDER By Stud_Mark) as 'ROW NUMBER',

RANK() OVER (ORDER By Stud_Mark) as 'RANK',

DENSE_RANK() OVER (ORDER By Stud_Mark) as 'DENSE RANK',

NTILE(2) OVER (ORDER By Stud_Mark) as 'NTILE'

FROM Students

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