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

There are three methods are there...

SELECT salary,first_name,rnk 
FROM (SELECT salary,first_name,rank() over (order by salary desc nulls last) as                                                                  rnk from emp) where rnk=3;


SELECT salary,first_name,rnk 
FROM (SELECT salary,first_name,dense_rank() over (order by salary desc nulls last) as                                                                  rnk from emp) where rnk=3;


select rnk,first_name,salary 
from (select rownum as rnk ,first_name,salary 
      from (select first_name,salary 
            from emp order by salary desc nulls last)) where rnk=3