text: CREATE SCHEMA IF NOT EXISTS `db_1`;
  
  CREATE TABLE IF NOT EXISTS `t_order` (`order_id` INT NOT NULL, `user_id` INT NOT NULL, `status` VARCHAR(45) NULL, PRIMARY KEY (`order_id`));
  CREATE TABLE IF NOT EXISTS `t_order_item` (`item_id` INT NOT NULL, `order_id` INT NOT NULL, `user_id` INT NOT NULL, `status` VARCHAR(45) NULL, PRIMARY KEY (`item_id`));
  