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 "Has_Pet" (
"StuID" INT,
"PetID" INT,
FOREIGN KEY ("PetID") REFERENCES "Pets"("PetID"),
FOREIGN KEY ("StuID") REFERENCES "Student"("StuID")
);

CREATE TABLE "Pets" (
"PetID" INT UNIQUE,
"PetType" VARCHAR(20),
"pet_age" INT,
PRIMARY KEY ("PetID")
);

CREATE TABLE "Student" (
"StuID" INT UNIQUE,
"Age" INT,
"Sex" VARCHAR(1),
PRIMARY KEY ("StuID")
);





INSERT INTO "Student" VALUES ("1", "20", "F");
INSERT INTO "Student" VALUES ("2", "22", "M");
INSERT INTO "Student" VALUES ("3", "19", "F");
INSERT INTO "Student" VALUES ("4", "21", "M");
INSERT INTO "Student" VALUES ("5", "23", "F");
INSERT INTO "Student" VALUES ("6", "20", "F");
INSERT INTO "Student" VALUES ("7", "18", "M");
INSERT INTO "Student" VALUES ("8", "22", "F");
INSERT INTO "Pets" VALUES ("101", "dog", "3");
INSERT INTO "Pets" VALUES ("102", "cat", "2");
INSERT INTO "Pets" VALUES ("103", "dog", "5");
INSERT INTO "Pets" VALUES ("104", "parrot", "1");
INSERT INTO "Pets" VALUES ("105", "dog", "4");
INSERT INTO "Pets" VALUES ("106", "hamster", "1");
INSERT INTO "Pets" VALUES ("107", "dog", "2");
INSERT INTO "Pets" VALUES ("108", "cat", "3");
INSERT INTO "Pets" VALUES ("109", "dog", "7");
INSERT INTO "Pets" VALUES ("110", "rabbit", "2");
INSERT INTO "Has_Pet" VALUES ("1", "101");
INSERT INTO "Has_Pet" VALUES ("1", "102");
INSERT INTO "Has_Pet" VALUES ("2", "103");
INSERT INTO "Has_Pet" VALUES ("3", "104");
INSERT INTO "Has_Pet" VALUES ("3", "105");
INSERT INTO "Has_Pet" VALUES ("4", "106");
INSERT INTO "Has_Pet" VALUES ("5", "107");
INSERT INTO "Has_Pet" VALUES ("6", "108");
INSERT INTO "Has_Pet" VALUES ("6", "109");
INSERT INTO "Has_Pet" VALUES ("7", "110");
INSERT INTO "Has_Pet" VALUES ("8", "101");
INSERT INTO "Has_Pet" VALUES ("8", "105");