MySQL分组查询一个例子

需求：
查询当前ID邀请的人，再次邀请人的数量。

语句：
首先通过邀请人ID分组，再进行COUNT

SELECT invited_id as uid,COUNT(1) as total FROM `sh_user` WHERE `invited_id` in (SELECT id FROM sh_user WHERE invited_id=615 and is_proxy=1 )   GROUP BY `invited_id` HAVING COUNT(*) > 0