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CREATE TABLE 'airlines' (
uid INTEGER PRIMARY KEY,
Airline TEXT,
Abbreviation TEXT,
Country TEXT
);
CREATE TABLE 'airports' (
City TEXT,
AirportCode TEXT PRIMARY KEY,
AirportName TEXT,
Country TEXT,
CountryAbbrev TEXT
);
CREATE TABLE 'flights' (
Airline INTEGER,
FlightNo INTEGER,
SourceAirport TEXT,
DestAirport TEXT,
PRIMARY KEY(Airline, FlightNo),
FOREIGN KEY (SourceAirport) REFERENCES airports(AirportCode),
FOREIGN KEY (DestAirport) REFERENCES airports(AirportCode)
);
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