แสดงเที่ยวบินทั้งหมดจากพิตส์เบิร์กไปยังฟิลาเดลเฟีย ซึ่งมาถึงก่อน 8.00 น. ในวันพุธ ไม่จำเป็นที่จะต้องใช้ตารางทั้งหมด
show me all flights from PITTSBURGH to PHILADELPHIA which arrive before 800 o'clock am on wednesdayIt is not neccessary to use all the tables.
 restriction:  restriction_code [ text]  advance_purchase [ int]  stopovers [ text]  saturday_stay_required [ text]  minimum_stay [ int]  maximum_stay [ int]  application [ text]  no_discounts [ 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, date_day, days, flight WHERE (((((flight.arrival_time < flight.departure_time) AND date_day.day_number = 23 AND date_day.month_number = 4 AND date_day.year = 1991 AND days.day_name = date_day.day_name AND flight.flight_days = days.days_code) OR (date_day.day_number = 23 AND date_day.month_number = 4 AND date_day.year = 1991 AND days.day_name = date_day.day_name AND flight.flight_days = days.days_code AND NOT (flight.arrival_time < flight.departure_time))) AND flight.arrival_time < 800) AND CITY_1.city_code = AIRPORT_SERVICE_1.city_code AND CITY_1.city_name = 'PHILADELPHIA' AND flight.to_airport = AIRPORT_SERVICE_1.airport_code) AND CITY_0.city_code = AIRPORT_SERVICE_0.city_code AND CITY_0.city_name = 'PITTSBURGH' AND flight.from_airport = AIRPORT_SERVICE_0.airport_code