Nth Salary by DENSE_RANK()
  Find nth highest salary by DENSE_RANK ()     DECLARE  @employees AS  TABLE ( EmpId INT  IDENTITY ( 1 , 1 ),  EmpName VARCHAR ( 20 ),  Salary INT )   DECLARE  @nthSalary INT  =  3     INSERT  INTO  @employees ( EmpName ,  Salary )   VALUES ( 'Sohan' ,  2000 ),  ( 'Rohan' ,  4000 ),  ( 'Mohan' ,  3000 ),  ( 'Ram' ,  2000 ),  ( 'Seema' ,  3000 )     /* List all with salary rank */   SELECT  *,  DENSE_RANK ()  OVER ( ORDER  BY  Salary DESC )  AS  SalaryRank FROM  @employees     /* List those having required highest salary */   SELECT  *  FROM    (         SELECT  *,  DENSE_RANK ()  OVER ( ORDER  BY  Salary DESC )  AS  SalaryRank FROM  @employees   ) a   WHERE  a . SalaryRank =  @nthSalary     /* Highest required salary */   SELECT  DISTINCT  Salary  FROM    (         SELECT  *,  DENSE_RANK ()  OVER ( ORDER  BY  Salary DESC )  AS  SalaryRank FROM  @employees   ) a   WHERE  a . SalaryRank =  @nthSalary