select a.id, name, age, gender, phone, id_num, station_id, a.create_time, a.create_user,b.is_open, open_id from water_station_user a left join water_station b on a.station_id=b.id
select a.id, name, age, gender, phone, id_num, station_id, a.create_time, a.create_user,b.is_open, open_id,wx_openid from water_station_user a left join water_station b on a.station_id=b.id