text: drop table t_coffee if exists;
  drop table t_order if exists;
  drop table t_order_coffee if exists;
  
  create table t_coffee (
      id bigint auto_increment,
      create_time timestamp,
      update_time timestamp,
      name varchar(255),
      price bigint,
      primary key (id)
  );
  
  create table t_order (
      id bigint auto_increment,
      create_time timestamp,
      update_time timestamp,
      customer varchar(255),
      state integer not null,
      primary key (id)
  );
  
  create table t_order_coffee (
      coffee_order_id bigint not null,
      items_id bigint not null
  );
  
  insert into t_coffee (name, price, create_time, update_time) values ('espresso', 2000, now(), now());
  insert into t_coffee (name, price, create_time, update_time) values ('latte', 2500, now(), now());
  insert into t_coffee (name, price, create_time, update_time) values ('capuccino', 2500, now(), now());
  insert into t_coffee (name, price, create_time, update_time) values ('mocha', 3000, now(), now());
  insert into t_coffee (name, price, create_time, update_time) values ('macchiato', 3000, now(), now());