作爲筆記，後面補充
/*SELECT f.name, ft.name FROM t_food f, t_food_type ft WHERE f.food_type_id = ft.id AND ft.name = '魯菜'; 錶鏈接*/
或者
/*SELECT f.name, ft.name FROM t_food f JOIN t_food_type ft WHERE f.food_type_id = ft.id AND ft.name = '魯菜'; 錶鏈接*/
/*SELECT * FROM t_food WHERE food_type_id = (SELECT id FROM t_food_type WHERE name = '魯菜'); 嵌套查詢，不叫錶鏈接*/