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 sal
    FROM (
                SELECT empno,
                             deptno, sal,
                              dense_rank( ) over ( partition by deptno order by sal desc) NRANK
                FROM emp
            )
    WHERE NRANK = 4