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 "concert" (
"concert_ID" INT,
"Year" TEXT,
PRIMARY KEY ("concert_ID")
);

CREATE TABLE "singer" (
"Singer_ID" INT,
"Country" TEXT,
"Age" INT,
"Is_male" BOOLEAN,
PRIMARY KEY ("Singer_ID")
);

CREATE TABLE "stadium" (
"Stadium_ID" INT,
"Location" TEXT,
PRIMARY KEY ("Stadium_ID")
);





INSERT INTO "concert" VALUES ("1", "2014");
INSERT INTO "concert" VALUES ("2", "2015");
INSERT INTO "concert" VALUES ("3", "2016");
INSERT INTO "concert" VALUES ("4", "2017");
INSERT INTO "concert" VALUES ("5", "2018");
INSERT INTO "concert" VALUES ("6", "2019");
INSERT INTO "concert" VALUES ("7", "2020");
INSERT INTO "singer" VALUES ("1", "France", "30", "1");
INSERT INTO "singer" VALUES ("2", "USA", "25", "0");
INSERT INTO "singer" VALUES ("3", "France", "40", "0");
INSERT INTO "singer" VALUES ("4", "UK", "35", "1");
INSERT INTO "singer" VALUES ("5", "France", "20", "1");
INSERT INTO "singer" VALUES ("6", "Germany", "50", "0");
INSERT INTO "singer" VALUES ("7", "France", "60", "1");
INSERT INTO "singer" VALUES ("8", "France", "30", "0");
INSERT INTO "singer" VALUES ("9", "France", "20", "0");
INSERT INTO "singer" VALUES ("10", "France", "40", "1");
INSERT INTO "stadium" VALUES ("1", "Paris");
INSERT INTO "stadium" VALUES ("2", "London");
INSERT INTO "stadium" VALUES ("3", "New York");
INSERT INTO "stadium" VALUES ("4", "Berlin");
INSERT INTO "stadium" VALUES ("5", "Tokyo");