SELECT T1.FlightNo FROM FLIGHTS AS T1 JOIN AIRPORTS AS T2 ON T1.SourceAirport = T2.AirportCode WHERE T2.City = "Aberdeen"
Berapa jumlah penerbangan penerbangan yang berangkat dari kota "Aberdeen"?
CREATE TABLE FLIGHTS (FlightNo VARCHAR, SourceAirport VARCHAR); CREATE TABLE AIRPORTS (AirportCode VARCHAR, City VARCHAR)