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

Quite straightforward and declarative, but slow

select 
  t1.*
from 
  #tmp t1
  inner join #tmp h1 on h1.dept = t1.dept and h1.emp <> t1.emp
  left outer join #tmp h2 on h2.dept = h1.dept and h2.salary > h1.salary
  left outer join #tmp t2 on t1.dept = t2.dept and t2.salary > t1.salary and t2.emp <> h1.emp
where 
  t2.emp is null and h2.emp is null