Nth max salary in Oracle

Question

To find out the Nth max sal in oracle i\'m using below query

SELECT DISTINCE sal 
FROM emp a 
WHERE (
       SELECT COUNT(DISTINCE sal) 
       FROM emp b 
          


        

Answer 1

select min(sal) from (select distinct(sal) from emp  order by sal desc) where rownum <=&n;

Inner query select distinct(sal) from emp order by sal desc will give the below output as given below.

SAL 5000 3000 2975 2850 2450 1600 1500 1300 1250 1100 950 800

without distinct in the above query select sal from emp order by sal desc output as given below.

SAL 5000 3000 3000 2975 2850 2450 1600 1500 1300 1250 1250 1100 950 800

outer query will give the 'N'th max sal (E.g) I have tried here for 4th Max sal and out put as given below.

MIN(SAL) 2850

Answer 2

SELECT TOP (1) Salary FROM
(
    SELECT DISTINCT TOP (10) Salary FROM Employee ORDER BY Salary DESC
) AS Emp ORDER BY Salary

This is for 10th max salary, you can replace 10 with n.

Answer 3

5th highest salary:

SELECT
    * 
FROM
    emp a 
WHERE 
    4 = (
        SELECT 
            COUNT(DISTINCT b.sal) 
        FROM 
            emp b 
        WHERE 
            a.sal < b.sal
    )

Replace 4 with any value of N.

Answer 4

Try out following:

SELECT *
FROM
  (SELECT rownum AS rn,
    a.*
  FROM
    (WITH DATA AS -- creating dummy data
    ( SELECT 'MOHAN' AS NAME, 200 AS SALARY FROM DUAL
    UNION ALL
    SELECT 'AKSHAY' AS NAME, 500 AS SALARY FROM DUAL
    UNION ALL
    SELECT 'HARI' AS NAME, 300 AS SALARY FROM DUAL
    UNION ALL
    SELECT 'RAM' AS NAME, 400 AS SALARY FROM DUAL
    )
  SELECT D.* FROM DATA D ORDER BY SALARY DESC
    ) A
  )
WHERE rn = 3; -- specify N'th highest here (In this case fetching 3'rd highest)

Cheers!

Answer 5

Select min(salary) from (
  select distinct(salary) from empdetails order by salary desc
) where rownum <=&rn

Just enter nth number which you want.

Answer 6

You can optimize the query using Dense_rank() function.

for Example :

select distinct salary from ( select salary ,dense_rank() over (order by salary desc) ranking from Employee ) where ranking = 6

Note: ranking 6 is the number of nth order.