เที่ยวบิน UA 281 จากบอสตันไปเดนเวอร์ราคาเท่าไหร่ไม่จำเป็นต้องใช้ตารางทั้งหมด
how much does flight UA 281 from BOSTON to DENVER costIt is not neccessary to use all the tables.
 airline:  airline_code [ varchar]  airline_name [ text]  note [ 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 (((flight.airline_code = 'UA') AND flight.flight_number = 281) AND CITY_1.city_code = AIRPORT_SERVICE_1.city_code AND CITY_1.city_name = 'DENVER' AND flight.to_airport = AIRPORT_SERVICE_1.airport_code) AND CITY_0.city_code = AIRPORT_SERVICE_0.city_code AND CITY_0.city_name = 'BOSTON' 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