帝国cms调用信息按收藏数排序SQL的方法

select a.id,a.classid,a.title,a.titlepic,a.username,a.userid,a.applynum,a.onclick,a.titleurl,b.id,b.classid,count(b.id) fromphome_ecms_newsas a left join phone_enewsfava as b on a.id=b.id and a.classid=b.classid wherea.classid=1anda.ispic=1group by a.id order by count(b.id) DESC limit 5