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", "Delta Air Lines");
INSERT INTO "airlines" VALUES ("2", "American Airlines");
INSERT INTO "airlines" VALUES ("3", "United Airlines");
INSERT INTO "airlines" VALUES ("4", "Southwest Airlines");
INSERT INTO "airlines" VALUES ("5", "Alaska Airlines");
INSERT INTO "airports" VALUES ("Aberdeen", "ABZ", "Aberdeen International Airport");
INSERT INTO "airports" VALUES ("Abilene", "ABI", "Abilene Regional Airport");
INSERT INTO "airports" VALUES ("New York", "JFK", "John F. Kennedy International Airport");
INSERT INTO "airports" VALUES ("Los Angeles", "LAX", "Los Angeles International Airport");
INSERT INTO "airports" VALUES ("Chicago", "ORD", "O'Hare International Airport");
INSERT INTO "airports" VALUES ("Dallas", "DFW", "Dallas/Fort Worth International Airport");
INSERT INTO "airports" VALUES ("Denver", "DEN", "Denver International Airport");
INSERT INTO "airports" VALUES ("Miami", "MIA", "Miami International Airport");
INSERT INTO "airports" VALUES ("Seattle", "SEA", "Seattle-Tacoma International Airport");
INSERT INTO "airports" VALUES ("Boston", "BOS", "Logan International Airport");
INSERT INTO "flights" VALUES ("1", "101", "JFK", "ABZ");
INSERT INTO "flights" VALUES ("1", "102", "LAX", "ABI");
INSERT INTO "flights" VALUES ("2", "201", "ORD", "ABZ");
INSERT INTO "flights" VALUES ("2", "202", "DFW", "ABI");
INSERT INTO "flights" VALUES ("3", "301", "DEN", "ABZ");
INSERT INTO "flights" VALUES ("3", "302", "MIA", "ABI");
INSERT INTO "flights" VALUES ("4", "401", "SEA", "ABZ");
INSERT INTO "flights" VALUES ("4", "402", "BOS", "ABI");
INSERT INTO "flights" VALUES ("5", "501", "JFK", "LAX");
INSERT INTO "flights" VALUES ("5", "502", "ORD", "DFW");
INSERT INTO "flights" VALUES ("1", "103", "SEA", "JFK");
INSERT INTO "flights" VALUES ("2", "203", "LAX", "ORD");
INSERT INTO "flights" VALUES ("3", "303", "DFW", "MIA");
INSERT INTO "flights" VALUES ("4", "403", "BOS", "DEN");
INSERT INTO "flights" VALUES ("5", "503", "MIA", "SEA");