แสดงค่าโดยสารจากดัลลาสไปบัลติมอร์ซึ่งมีราคาต่ำกว่า 300 ดอลลาร์ให้ฉันดู ไม่จำเป็นต้องใช้ตารางทั้งหมด
show me fares from DALLAS to BALTIMORE that cost less than 300 dollarsIt is not neccessary to use all the tables.
 ground_service:  city_code [ text]  airport_code [ text]  transport_type [ text]  ground_fare [ int] 
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 = 'DALLAS' AND CITY_1.city_code = AIRPORT_SERVICE_1.city_code AND CITY_1.city_name = 'BALTIMORE' AND fare.one_direction_cost < 300 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