Mysql COUNT(*) on multiple tables

Question

What\'s wrong with this query:

SELECT co.*, mod.COUNT(*) as moduleCount, vid.COUNT(*) as vidCount 
 FROM courses as co, modules as mod, videos as vid 
 WHERE         


        

Answer 1

SELECT co.*,
       (
       SELECT  COUNT(*)
       FROM    modules mod
       WHERE   mod.course_id = co.id
       ) AS modCount,
       (
       SELECT  COUNT(*)
       FROM    videos vid
       WHERE   vid.course_id = co.id
       ) AS vidCount
FROM   courses co
ORDER BY
        co.id DESC