Se une a MySQL para obtener datos de varias tablas

SELECT u.id, 
       u.userid, 
       u.name, 
       u.mobile, 
       (SELECT Count(*) 
        FROM   follow f 
        WHERE  f.followerid = u.userid) AS follower, 
       (SELECT Count(*) 
        FROM   follow f 
        WHERE  f.followeeid = u.userid) AS followee 
FROM   users u