一个mysql问题，不知道怎么写了

SELECT
u.name NAME,
u.phone phone,
i.level LEVEL,
i.user_id,
COUNT(1) total
FROM
t_user u,t_invitationcode i ,(SELECT COUNT(*),user_id FROM t_invitationcode it WHERE it.user_id=i.user_id) t3
WHERE u.id=i.user_id
不知道怎么写了