คุณช่วยบอกค่าโดยสารไปกลับจากเดนเวอร์ไปยังแอตแลนต้าให้ฉันหน่อยได้ไหม ไม่จำเป็นต้องใช้ตารางทั้งหมด
could you please give me the round trip fare from DENVER to ATLANTAIt is not neccessary to use all the tables.
 class_of_service:  booking_class [ varchar]  rank [ int]  class_description [ text] 
SELECT DISTINCT fare.fare_id FROM airport_service AS AIRPORT_SERVICE_0, airport_service AS AIRPORT_SERVICE_1, city AS CITY_0, city AS CITY_1, fare, flight, flight_fare WHERE CITY_0.city_code = AIRPORT_SERVICE_0.city_code AND CITY_0.city_name = 'DENVER' AND CITY_1.city_code = AIRPORT_SERVICE_1.city_code AND CITY_1.city_name = 'ATLANTA' AND flight_fare.fare_id = fare.fare_id AND flight.flight_id = flight_fare.flight_id AND flight.from_airport = AIRPORT_SERVICE_0.airport_code AND flight.to_airport = AIRPORT_SERVICE_1.airport_code