$query
                ->innerJoin('histories' , 'users.id = histories.user_id')
                ->select('users.*, histories.user_id, avg(timestampdiff(minute,`histories`.`time_in`,`histories`.`time_out`)) as avgtime')
                ->groupBy('user_id')
                ->having('avgtime > ' . $this->wash_middle_time_more);