MySQL - Using JOIN and WHERE to determine average hours

Question

I am learning MySQL using a next.tech course that relies on the following schema:

My current task is to find the average number of hours worked on one specific

Answer 1

You need specific wich join you using, there's INNER,LEFT,RIGHT,FULL,OUTER So try these

SELECT AVG(hours) FROM project_employees
INNER JOIN  projects
ON  project_employees.employee_id = projects.id
WHERE name = 'Washington Avenue Barber';