PRAGMA foreign_keys = ON;

PRAGMA writable_schema = 1;
DELETE FROM sqlite_master WHERE type IN ("table", "index", "trigger");
PRAGMA writable_schema = 0;
VACUUM;

CREATE TABLE "airports" (
"City" TEXT,
"AirportCode" TEXT,
"AirportName" TEXT,
PRIMARY KEY ("AirportCode")
);

CREATE TABLE "flights" (
"Airline" INT,
"FlightNo" INT,
"SourceAirport" TEXT,
"DestAirport" TEXT,
PRIMARY KEY ("Airline", "FlightNo"),
FOREIGN KEY ("SourceAirport") REFERENCES "airports"("AirportCode"),
FOREIGN KEY ("DestAirport") REFERENCES "airports"("AirportCode")
);





INSERT INTO "airports" VALUES ("Aberdeen", "ABZ", "Aberdeen International Airport");
INSERT INTO "airports" VALUES ("London", "LHR", "Heathrow Airport");
INSERT INTO "airports" VALUES ("Edinburgh", "EDI", "Edinburgh Airport");
INSERT INTO "airports" VALUES ("Glasgow", "GLA", "Glasgow Airport");
INSERT INTO "airports" VALUES ("Aberdeen", "FJR", "Fjordside Regional Airport");
INSERT INTO "airports" VALUES ("Manchester", "MAN", "Manchester Airport");
INSERT INTO "airports" VALUES ("Aberdeen", "ABD", "Aberdeen City Heliport");
INSERT INTO "flights" VALUES ("1", "101", "LHR", "ABZ");
INSERT INTO "flights" VALUES ("1", "102", "ABZ", "LHR");
INSERT INTO "flights" VALUES ("2", "201", "EDI", "GLA");
INSERT INTO "flights" VALUES ("3", "301", "ABZ", "MAN");
INSERT INTO "flights" VALUES ("4", "401", "MAN", "FJR");
INSERT INTO "flights" VALUES ("1", "103", "LHR", "ABD");
INSERT INTO "flights" VALUES ("5", "501", "ABD", "EDI");