executeUpdate(dataSource,"CREATE TABLE IF NOT EXISTS `t_order` (`order_id` INT NOT NULL, `user_id` INT NOT NULL, `status` VARCHAR(50), PRIMARY KEY (`order_id`))");
executeUpdate(dataSource,"CREATE TABLE IF NOT EXISTS `t_order_item` (`item_id` INT NOT NULL, `order_id` INT NOT NULL, `user_id` INT NOT NULL, PRIMARY KEY (`item_id`))");