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

select min(salary),deptno from
(SELECT distinct top 2 salary,deptno from table ORDER BY salary DESC)
as  a 
group by deptno