创建rfbh，GB2312数据表。用alter add命令增加表的（address）字段。

CREATE TABLE IF NOT EXISTS `rfbh` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(50) NOT NULL,
`tel` varchar(50) NOT NULL,
`title` varchar(255) NOT NULL,
`contents` text NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=gb2312 AUTO_INCREMENT=1 ;

alter table rfbh add address int(50) NOT NULL;