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 "city" (
"ID" INT,
"Population" INT,
PRIMARY KEY ("ID")
);

CREATE TABLE "country" (
"Code" CHAR(3),
"Name" CHAR(52),
"SurfaceArea" FLOAT,
"Population" INT,
"HeadOfState" CHAR(60),
PRIMARY KEY ("Code")
);

CREATE TABLE "countrylanguage" (
"CountryCode" CHAR(3),
"Language" CHAR(30),
"Percentage" FLOAT,
PRIMARY KEY ("CountryCode", "Language")
);





INSERT INTO "city" VALUES ("1", "5000000");
INSERT INTO "city" VALUES ("2", "12000000");
INSERT INTO "city" VALUES ("3", "800000");
INSERT INTO "city" VALUES ("4", "3000000");
INSERT INTO "city" VALUES ("5", "15000000");
INSERT INTO "country" VALUES ("USA", "United States of America", "9833520.0", "331000000", "Joe Biden");
INSERT INTO "country" VALUES ("CAN", "Canada", "9984670.0", "38000000", "Justin Trudeau");
INSERT INTO "country" VALUES ("RUS", "Russia", "17098242.0", "146000000", "Vladimir Putin");
INSERT INTO "country" VALUES ("CHN", "China", "9596961.0", "1402000000", "Xi Jinping");
INSERT INTO "country" VALUES ("BRA", "Brazil", "8515767.0", "212000000", "Jair Bolsonaro");
INSERT INTO "countrylanguage" VALUES ("USA", "English", "82.1");
INSERT INTO "countrylanguage" VALUES ("USA", "Spanish", "10.7");
INSERT INTO "countrylanguage" VALUES ("CAN", "English", "56.0");
INSERT INTO "countrylanguage" VALUES ("CAN", "French", "21.0");
INSERT INTO "countrylanguage" VALUES ("CHN", "Mandarin", "70.0");
INSERT INTO "countrylanguage" VALUES ("CHN", "Cantonese", "5.0");
INSERT INTO "countrylanguage" VALUES ("BRA", "Portuguese", "98.0");
INSERT INTO "countrylanguage" VALUES ("BRA", "Spanish", "1.0");