คุณช่วยบอกฉันหน่อยได้ไหมว่าคุณมีเที่ยวบินใดบ้างที่วิ่งทุกวันจากบอสตันไปซานฟรานซิสโก ไม่จำเป็นต้องใช้ตารางทั้งหมด
could you tell me what flights you have that run DAILY from BOSTON to SAN FRANCISCO pleaseIt is not neccessary to use all the tables.
 food_service:  meal_code [ text]  meal_number [ int]  compartment [ text]  meal_description [ varchar] 
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, flight WHERE (CITY_0.city_code = AIRPORT_SERVICE_0.city_code AND CITY_0.city_name = 'BOSTON' AND CITY_1.city_code = AIRPORT_SERVICE_1.city_code AND CITY_1.city_name = 'SAN FRANCISCO' AND flight.from_airport = AIRPORT_SERVICE_0.airport_code AND flight.to_airport = AIRPORT_SERVICE_1.airport_code) AND flight.flight_days = 'DAILY'