text: drop database if exists transactional;
  CREATE database transactional;
  use transactional;
  
  drop table if exists t_user;
  CREATE TABLE t_user(
    id int auto_increment primary key,
    name varchar(20),
    age int
  );
  
  drop table if exists t_person;
  CREATE TABLE t_person(
    id int auto_increment primary key,
    name varchar(20),
    age int
  );