Question

I have a table named department, which has following data

DNO DNAME   SALARY
20  EE  30000
10  DoC 50000
30  ITS 20000

I want to select employee with maximum and minimum salary WITHOUT using GROUP functions or top-n analysis or NOT EXISTS command. Any help will be appreciated. Thanks

Answer 1

For max. salary:

SELECT *
FROM department d1
WHERE salary > ALL (SELECT d2.salary
                    FROM department d2
                    WHERE d2.dno <> d1.dno)

For min salary:

SELECT *
FROM department d1
WHERE salary < ALL (SELECT d2.salary
                    FROM department d2
                    WHERE d2.dno <> d1.dno)

Both solutions assume that salary can not be null