Functions
Lesson 14Author : 🦒
Last Updated : December, 2017
Code
-- Find the number of employees
SELECT COUNT(super_id)
FROM employee;
-- Find the average of all employee's salaries
SELECT AVG(salary)
FROM employee;
-- Find the sum of all employee's salaries
SELECT SUM(salary)
FROM employee;
-- Find out how many males and females there are
SELECT COUNT(sex), sex
FROM employee
GROUP BY sex
-- Find the total sales of each salesman
SELECT SUM(total_sales), emp_id
FROM works_with
GROUP BY client_id;
-- Find the total amount of money spent by each client
SELECT SUM(total_sales), client_id
FROM works_with
GROUP BY client_id;