how to get second highest salary department wise without using analytical functions?

Question

Suppose we have 3 employees in each department.we have total 3 departments . Below is the sample source table

Emp deptno salary
A    10     1000
B    10              


        

Answer 1

Solution using Correlated Subquery:

SELECT * FROM emp e1 WHERE 2 = (SELECT COUNT(DISTINCT sal)
                                  FROM emp e2 
                                 WHERE e1.sal <= e2.sal
                                   AND e1.deptno = e2.deptno
                               );