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
        WHERE  sal IS NOT NULL
        ORDER  BY sal DESC)
WHERE  rownum <= n;