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

Very simple logic.

Please try:

SELECT dept as dd, ( SELECT ee.salary FROM `employees` as ee WHERE ee.dept=dd 
ORDER BY ee.salary DESC LIMIT 1,1 ) as sndHigh 
FROM `employees` 
WHERE 1 
GROUP BY dept