error code [1267];
Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation 'like'
对于常见的乱码问题，有的在数据库本身已经为gbk或gb2312时候，但是查询出来却是乱码，这是因为mysql在连接的过程中还有道编码，因此将连接的编码设为gb2312或utf-8
即可，如：
jdbc:mysql://localhost:3306/ipanel?useUnicode=true&characterEncoding=UTF-8
hibernate和jdbc的参数设置是不一样，但大体相同，网上类似的资料很多。
最重要的是这个问题：
Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (gb2312_chinese_ci,IMPLICIT) for operation '='
相信有很多人碰到，意思是说字符编码不一样，不能进行比较，也就是说数据库内部的编码都不一样，有的数据是
gbk_chinese_ci,有的数据是gb2312_chinese_ci，因此解决此问题的核心就是将数据库所有的编码进行统一。
解决方案一：暂时
//恶心的gb2312不能使用，需要转utf-8再继续
$where = $where . iconv("gb2312","utf-8"," and USER_NAME='" . $uname . "'");
解决方案二：
进入命令行模式，
如果MySQL数据库已经安装好，可以使用下列SQL命令查看MySQL当前的字符集设置：
mysql> SHOW VARIABLES LIKE 'character_set_%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | latin1 |
| character_set_connection | latin1 |
| character_set_database | latin1 |
| character_set_results | latin1 |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
7 rows in set (0.00 sec)
mysql> SHOW VARIABLES LIKE 'collation_%';
+----------------------+-------------------+
| Variable_name | Value |
+----------------------+-------------------+
| collation_connection | latin1_swedish_ci |
| collation_database | latin1_swedish_ci |
| collation_server | latin1_swedish_ci |
+----------------------+-------------------+
3 rows in set (0.00 sec)
依次执行：
set character_set_client =gb2312;
set character_set_connection =gb2312;
set character_set_database =gb2312;
set character_set_results =gb2312;
set character_set_server =gb2312;
set character_set_system =gb2312; --此处utf-8也可以
然后执行：
SET collation_server = gb2312_chinese_ci
SET collation_database = gb2312_chinese_ci
SET collation_connection =gb2312_chinese_ci
执行完之后，请检查mysql下每个数据库，表，字段是否都是gb2312，不是则改过来，这样子就不会出现
Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (gb2312_chinese_ci,IMPLICIT) for operation '='这个错误了，网上有资料说要重装，其实根本就不必，改动其编码即可
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PHP5.2+MYSQL5.1+APACHE2.29 IE6，firefor2,firefox3
PHP网页向MYSQL数据库插入记录时出现如下问题。
Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (latin1_swedish_ci,COERCIBLE) for operation '=' ？？？？？？？？？？？？
解决方法:1.注意PHP网站 charset=UTF-8"
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
2.数据库连接设置为 utf8编码
<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_member = "localhost";
$database_member = "member";
$username_member = "root";
$password_member = "123456";
$member = mysql_pconnect($hostname_member, $username_member, $password_member) or trigger_error(mysql_error(),E_USER_ERROR);
mysql_query("set names gbk");
?>
请修改为 mysql_query("set names utf8");
中文问题花去一天时间，请注意php和MYSQL编码发送相同问题。与MYSQL数据库编码无关
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