อะไรคือบริการกลางคืนชั้นประหยัดของ COACH จากบอสตันถึงซานฟรานซิสโก ไม่จำเป็นต้องใช้ตารางทั้งหมด
what is the COACH economy class night service from BOSTON to SAN FRANCISCOIt is not neccessary to use all the tables.
 code_description:  code [ varchar]  description [ text] 
SELECT DISTINCT flight.flight_id FROM airport_service AS AIRPORT_SERVICE_0, airport_service AS AIRPORT_SERVICE_1, city AS CITY_0, city AS CITY_1, fare, fare_basis, flight, flight_fare WHERE ((CITY_1.city_code = AIRPORT_SERVICE_1.city_code AND CITY_1.city_name = 'SAN FRANCISCO' AND fare_basis.class_type = 'COACH' AND fare.fare_basis_code = fare_basis.fare_basis_code AND flight_fare.fare_id = fare.fare_id AND flight.flight_id = flight_fare.flight_id 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.from_airport = AIRPORT_SERVICE_0.airport_code) AND NOT flight.departure_time BETWEEN 601 AND 1759