update t_free_m** m set m.plate_no = (
select v.plate_num from t_wh_vehi*** v where v.vin = m.car_vin )
where m.plate_no = '';
update t_free_m** m set m.plate_no = (
select v.plate_num from t_wh_vehi*** v where v.vin = m.car_vin )
where m.plate_no = '';