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 "matches" (
"winner_id" INT,
FOREIGN KEY ("winner_id") REFERENCES "players"("player_id")
);

CREATE TABLE "players" (
"player_id" INT UNIQUE,
"first_name" TEXT,
"last_name" TEXT,
PRIMARY KEY ("player_id")
);

CREATE TABLE "rankings" (
"ranking" INT,
"player_id" INT,
"ranking_points" INT,
FOREIGN KEY ("player_id") REFERENCES "players"("player_id")
);





INSERT INTO "players" VALUES ("1", "Serena", "Williams");
INSERT INTO "players" VALUES ("2", "Venus", "Williams");
INSERT INTO "players" VALUES ("3", "Naomi", "Osaka");
INSERT INTO "players" VALUES ("4", "Simona", "Halep");
INSERT INTO "players" VALUES ("5", "Ashleigh", "Barty");
INSERT INTO "players" VALUES ("6", "Sofia", "Kenin");
INSERT INTO "players" VALUES ("7", "Petra", "Kvitova");
INSERT INTO "players" VALUES ("8", "Bianca", "Andreescu");
INSERT INTO "rankings" VALUES ("1", "1", "8500");
INSERT INTO "rankings" VALUES ("2", "1", "8700");
INSERT INTO "rankings" VALUES ("3", "2", "7800");
INSERT INTO "rankings" VALUES ("4", "2", "7900");
INSERT INTO "rankings" VALUES ("5", "3", "9200");
INSERT INTO "rankings" VALUES ("6", "3", "9100");
INSERT INTO "rankings" VALUES ("7", "4", "8600");
INSERT INTO "rankings" VALUES ("8", "4", "8400");
INSERT INTO "rankings" VALUES ("9", "5", "9300");
INSERT INTO "rankings" VALUES ("10", "5", "9400");
INSERT INTO "rankings" VALUES ("11", "6", "7000");
INSERT INTO "rankings" VALUES ("12", "6", "7100");
INSERT INTO "rankings" VALUES ("13", "7", "7500");
INSERT INTO "rankings" VALUES ("14", "7", "7600");
INSERT INTO "rankings" VALUES ("15", "8", "8000");
INSERT INTO "rankings" VALUES ("16", "8", "8100");
INSERT INTO "matches" VALUES ("1");
INSERT INTO "matches" VALUES ("2");
INSERT INTO "matches" VALUES ("3");
INSERT INTO "matches" VALUES ("4");
INSERT INTO "matches" VALUES ("5");
INSERT INTO "matches" VALUES ("6");
INSERT INTO "matches" VALUES ("7");
INSERT INTO "matches" VALUES ("8");
INSERT INTO "matches" VALUES ("1");
INSERT INTO "matches" VALUES ("3");
INSERT INTO "matches" VALUES ("5");
INSERT INTO "matches" VALUES ("7");