ใช้เวลาเดินทางจาก แคนซัสซิตี ไป เซนต์ปีเตอร์สเบิร์ก นานแค่ไหน? PAULไม่จำเป็นต้องใช้ตารางทั้งหมด
how long does it take to get from KANSAS CITY to ST. PAULIt is not neccessary to use all the tables.
 flight_stop:  flight_id [ int]  stop_number [ int]  stop_days [ text]  stop_airport [ text]  arrival_time [ int]  arrival_airline [ text]  arrival_flight_number [ int]  departure_time [ int]  departure_airline [ text]  departure_flight_number [ int]  stop_time [ int] 
SELECT DISTINCT flight.time_elapsed FROM airport_service AS AIRPORT_SERVICE_0, airport_service AS AIRPORT_SERVICE_1, city AS CITY_0, city AS CITY_1, flight WHERE CITY_0.city_code = AIRPORT_SERVICE_0.city_code AND CITY_0.city_name = 'KANSAS CITY' AND CITY_1.city_code = AIRPORT_SERVICE_1.city_code AND CITY_1.city_name = 'ST. PAUL' AND flight.from_airport = AIRPORT_SERVICE_0.airport_code AND flight.to_airport = AIRPORT_SERVICE_1.airport_code