### having :having条件 * * * * * ~~~ having('count(user_id)>10') $where =new Where(); 相当于 $where->where('count(user_id)','>',10); having($where); ~~~ 实例: ~~~ DB::select('user_event e')->having('count(user_id)>10')->group('begin_day')->findAll(); 相当于sql select * from user_event e having count(user_id)>10 group by begin_day ~~~