SQL query to find Nth highest salary

Question

I am referring to following query to find Nth highest salary of a employee.

select sal from emp t where &n = (select count(sal) from (select distinct sal         


        

Answer 1

Query:

select 
    ename  
    ,sal  
    ,dense_rank() over (order by sal desc) ranking  
from   emp;  

output:

ENAME   SAL   RANKING
KING    5000    1   
FORD    3000    2  
SCOTT   3000    2  
JONES   2975    3  
CLARK   2850    4  
BLAKE   2850    4  
ALLEN   1600    5  

Wrap a filter around and pick out the Nth highest salary, say the 4th highest salary.

Query:

select *  
from  
(  
  select ename  
        ,sal  
        ,dense_rank() over (order by sal desc) ranking  
  from   emp  
)  
where ranking = 4 -- Replace 4 with any value of N  

output:

ENAME  SAL  RANKING
BLAKE  2850     4  
CLARK  2850     4