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

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.