CREATE TABLE favourites (
                             id int AUTO INCREMENT NOT NULL PRIMARY KEY, 
                             menu_id int NOT NULL, 
                             rest_id int NOT NULL, 
                             FOREIGN KEY (menu_id) REFERENCES menus(id) 
                             ON DELETE CASCADE ON UPDATE CASCADE, 
                             FOREIGN KEY (rest_id) REFERENCES restaurants(id) 
                             ON DELETE CASCADE ON UPDATE CASCADE
                             )

id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT