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 "airlines" (
"uid" INT,
"Airline" TEXT,
PRIMARY KEY ("uid")
);

CREATE TABLE "airports" (
"City" TEXT,
"AirportCode" TEXT UNIQUE,
"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 "airlines" VALUES ("1", "United Airlines");
INSERT INTO "airlines" VALUES ("2", "Delta Air Lines");
INSERT INTO "airlines" VALUES ("3", "American Airlines");
INSERT INTO "airlines" VALUES ("4", "Southwest Airlines");
INSERT INTO "airlines" VALUES ("5", "Alaska Airlines");
INSERT INTO "airlines" VALUES ("6", "Spirit Airlines");
INSERT INTO "airlines" VALUES ("7", "Frontier Airlines");
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 ("Manchester", "MAN", "Manchester Airport");
INSERT INTO "airports" VALUES ("Dublin", "DUB", "Dublin Airport");
INSERT INTO "airports" VALUES ("Paris", "CDG", "Charles de Gaulle Airport");
INSERT INTO "airports" VALUES ("New York", "JFK", "John F. Kennedy International Airport");
INSERT INTO "airports" VALUES ("Chicago", "ORD", "O'Hare International Airport");
INSERT INTO "airports" VALUES ("Los Angeles", "LAX", "Los Angeles International Airport");
INSERT INTO "flights" VALUES ("1", "101", "LHR", "ABZ");
INSERT INTO "flights" VALUES ("1", "102", "EDI", "ABZ");
INSERT INTO "flights" VALUES ("2", "201", "GLA", "ABZ");
INSERT INTO "flights" VALUES ("2", "202", "MAN", "ABZ");
INSERT INTO "flights" VALUES ("3", "301", "DUB", "ABZ");
INSERT INTO "flights" VALUES ("3", "302", "CDG", "LHR");
INSERT INTO "flights" VALUES ("4", "401", "JFK", "LHR");
INSERT INTO "flights" VALUES ("4", "402", "ORD", "EDI");
INSERT INTO "flights" VALUES ("5", "501", "LAX", "MAN");
INSERT INTO "flights" VALUES ("6", "601", "ABZ", "LHR");
INSERT INTO "flights" VALUES ("7", "701", "ABZ", "EDI");
INSERT INTO "flights" VALUES ("1", "103", "LHR", "GLA");
INSERT INTO "flights" VALUES ("2", "203", "EDI", "DUB");
INSERT INTO "flights" VALUES ("3", "303", "MAN", "CDG");
INSERT INTO "flights" VALUES ("1", "104", "JFK", "ABZ");
INSERT INTO "flights" VALUES ("5", "502", "ORD", "ABZ");