text: DROP DATABASE stdb;
  CREATE DATABASE stdb;
  USE stdb;
  CREATE TABLE userinfo(
  	id INT(10) PRIMARY KEY AUTO_INCREMENT,
  	username VARCHAR(200),
  	PASSWORD VARCHAR(200)
  );    	
  -- insert into userinfo(username,password) values('liuyan','123456'),('wangbaoqiang','123321'),('fangbian','abcd'),('miejueshitai','123abc321');
  
  SELECT * FROM userinfo;