ขอแสดงการขนส่งภาคพื้นดินในดัลลัสให้ฉันดู ไม่จำเป็นต้องใช้ตารางทั้งหมด
show me ground transportation in DALLAS pleaseIt is not neccessary to use all the tables.
 flight:  aircraft_code_sequence [ text]  airline_code [ varchar]  airline_flight [ text]  arrival_time [ int]  connections [ int]  departure_time [ int]  dual_carrier [ text]  flight_days [ text]  flight_id [ int]  flight_number [ int]  from_airport [ varchar]  meal_code [ text]  stops [ int]  time_elapsed [ int]  to_airport [ varchar] 
SELECT DISTINCT ground_service.transport_type FROM city, ground_service WHERE city.city_name = 'DALLAS' AND ground_service.city_code = city.city_code