Get Employees Who Are Below Average Salary After A Raise

Question

I need to get fname, lname, salary of employees who are $400.00 below the average salary even after geting a 10% salary raise.

I\'m able to get employees who\'s salary i

Answer 1

You have the right idea, you just can't use aliases in the where clause like that. Just use the formula directly, and you should be fine. Also, you should probably use <=, and not =:

select Fname, Lname, Salary, 1.10 * Salary as NewSalary
from   employee
where  1.10 * Salary - (select AVG(salary) from employee) <= 400;

Answer 2

select Fname, Lname, Salary, 1.10 * Salary as NewSalary from employee where ((1.10 * Salary) - (select AVG(salary) from employee)) <= 400;

Answer 3

You can do this with one statement by using HAVING

select Fname, Lname, AVG(salary * 1.10)    
FROM employee
GROUP BY FNAME, LNAME 
HAVING (AVG(salary) * 1.10) = 400

But I don't understand the concept of average salary of an employee in a table. You could be looking for an average salary of a group of employees perhaps? Or maybe you are storing historical values of salaries, but again I see no purpose of calculating average of that.