text: insert into `user` (id, username, password) VALUES (1, '张三', '111111');
  insert into `user` (id, username, password) VALUES (2, '李四', '222222');
  insert into `user` (id, username, password) VALUES (3, '王五', '333333');
  insert into `user` (id, username, password) VALUES (4, '田六', '444444');