เที่ยวบินจากแอตแลนต้าโปรดไม่จำเป็นต้องใช้ตารางทั้งหมด
flights from ATLANTA pleaseIt is not neccessary to use all the tables.
 dual_carrier:  main_airline [ varchar]  low_flight_number [ int]  high_flight_number [ int]  dual_airline [ varchar]  service_name [ text] 
SELECT DISTINCT flight.flight_id FROM airport_service, city, flight WHERE city.city_code = airport_service.city_code AND city.city_name = 'ATLANTA' AND flight.from_airport = airport_service.airport_code