数据库E-R图作业

boking_date 

fly-by

booking_mess

flight_idflight_date

booking

launch_timearrival_timeif_late

airplane

airplane_idcapacitymodel

customer

customer_idname

flight

seat_num

takes

station

origin_station_idterminal_station_idorigin_countryorigin_cityterminal_countryterminal_city

schedule