深入剖析MySQL数据库字符集的出错现象

Illegal mix of collations (gbk_chinese_ci,IMPLICIT) 
and (gbk_bin,IMPLICIT) for operation '=', 
SQL State: HY000, Error Code: 1267

CREATE TABLE `teachers` (
id` int(11) NOT NULL default '0',
name` varchar(20) default NULL,
password` varchar(20) default NULL,
department_id` int(11) default NULL,
PRIMARY KEY  (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=gbk;

CREATE TABLE `teachers` (
id` int(11) NOT NULL default '0',
name` varchar(20) default NULL,
password` varchar(20) default NULL,
department_id` int(11) default NULL,
PRIMARY KEY  (`id`)
) ;