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 Airlines");
INSERT INTO "airlines" VALUES ("3", "American Airlines");
INSERT INTO "airlines" VALUES ("4", "Southwest Airlines");
INSERT INTO "airlines" VALUES ("5", "Alaska Airlines");
INSERT INTO "airports" VALUES ("Atlanta", "ATL", "HH 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 ("Los Angeles", "LAX", "Los Angeles International Airport");
INSERT INTO "airports" VALUES ("New York", "JFK", "John F. Kennedy International Airport");
INSERT INTO "airports" VALUES ("Orlando", "MCO", "Orlando International Airport");
INSERT INTO "airports" VALUES ("Denver", "DEN", "Denver International Airport");
INSERT INTO "airports" VALUES ("Houston", "IAH", "George Bush Intercontinental Airport");
INSERT INTO "airports" VALUES ("Phoenix", "PHX", "Phoenix Sky Harbor International Airport");
INSERT INTO "airports" VALUES ("Seattle", "SEA", "Seattle-Tacoma International Airport");
INSERT INTO "airports" VALUES ("Austin", "ATO", "Austin-Bergstrom International Airport");
INSERT INTO "airports" VALUES ("Miami", "MIA", "Miami International Airport");
INSERT INTO "airports" VALUES ("San Francisco", "SFO", "San Francisco International Airport");
INSERT INTO "flights" VALUES ("1", "101", "ATL", "ATO");
INSERT INTO "flights" VALUES ("1", "102", "ORD", "JFK");
INSERT INTO "flights" VALUES ("2", "201", "LAX", "ATO");
INSERT INTO "flights" VALUES ("2", "202", "DFW", "ORD");
INSERT INTO "flights" VALUES ("3", "301", "JFK", "LAX");
INSERT INTO "flights" VALUES ("3", "302", "MCO", "ATO");
INSERT INTO "flights" VALUES ("4", "401", "DEN", "JFK");
INSERT INTO "flights" VALUES ("4", "402", "IAH", "MCO");
INSERT INTO "flights" VALUES ("5", "501", "PHX", "SEA");
INSERT INTO "flights" VALUES ("5", "502", "SEA", "ATL");
INSERT INTO "flights" VALUES ("1", "103", "MIA", "ATO");
INSERT INTO "flights" VALUES ("2", "203", "SFO", "ATO");
INSERT INTO "flights" VALUES ("3", "303", "ORD", "ATO");
INSERT INTO "flights" VALUES ("4", "403", "LAX", "JFK");
INSERT INTO "flights" VALUES ("5", "503", "DEN", "ATO");