本文内容是关于MySQL的，和Python关系不大。

1. 安装MySQL

http://wiki.ubuntu.org.cn/MySQL
环境Ubuntu 14.04

2. 登录MySQL

mysql -u root -p

3. 创建数据库

创建数据库

CREATE DATABESE chatroom;

切换到chatroom 数据库

USE chatroom;

4. 创建表

创建用户注册表并初始化

CREATE TABLE username
(
  user_id    int  NOT NULL  AUTO_INCREMENT,
  user_name  char(20) NOT NULL ,
  password char(20)  NOT NULL,
  PRIMARY KEY (user_id)
) ENGINE=InnoDB;

# 往表中写入初始的数据
INSERT INTO username(user_id ,
  user_name  ,
  password 
)
VALUES(1,
  'Administrator',
  '1234');

INSERT INTO username(user_id,
  user_name  ,
  password 
)
VALUES(2,
  'netease1',
  '123');

INSERT INTO username(user_id,
  user_name  ,
  password 
)
VALUES(3,
  'netease2',
  '123');

INSERT INTO username(user_id ,
  user_name  ,
  password 
)
VALUES(4,
  'netease3',
  '123');

INSERT INTO username(user_id ,
  user_name  ,
  password 
)
VALUES(5,
  'netease4',
  '123');

创建房间表

CREATE TABLE room
(
  room_id    int  NOT NULL,
  creator  char(20) NOT NULL ,
  is_password bool, 
  password char(20) ,
  PRIMARY KEY (room_id)
) ENGINE=InnoDB;