3. COLLATIONS - 相关文章

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Mysql Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '='

MySQL字符串比较bug: select * from table_a a left join table_b b on a.field_a = b.field_b error: Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=' cause:两表编码方式不一致. resolve:将比较等式的一边进行字符串转换,如:"CONVERT…

彻底解决phpcms v9升级后,文章发布出现： Mysql 1267错误：MySQL Error : Illegal mix of collations 解决办法

彻底解决phpcms v9升级后,文章发布出现: MySQL Query : SELECT * FROM `withli_a`.`v9_keyword` WHERE `keyword` = '吼吼' AND `siteid` = '1' LIMIT 1 MySQL Error : Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (gbk_chinese_ci,COERCIBLE) for operation '=' MySQL…

information_schema系列之字符集校验（CHARACTER_SETS，COLLATIONS，COLLATION_CHARACTER_SET_APPLICABILITY）

1:CHARACTER_SETS 首先看一下查询前十条的结果: root@localhost [information_schema]>select * from CHARACTER_SETS order by MAXLEN DESC limit 10; +--------------------+----------------------+---------------------------------+--------+ | CHARACTER_SET_NAME | DEFAULT_CO…

10.1.5 Connection Character Sets and Collations

10.1.5 Connection Character Sets and Collations Several character set and collation system variables relate to a client's interaction with the server. Some of these have been mentioned in earlier sections: The server character set and collation are t…

information_schema.collations 学习

information_schema.collations 表中的每一行对应一个排序规则 1.information_schema.collations 表中学用列: 1.id :排序规则的ID 2.is_default :是否是字符集的默认排序规则 3.collation_name :排序规则名 4.character_set_name :这个排序规则所对应的字符集名字 5.is_compiled :是不已经被编译进MySQL来了 2.例子: 查看实例的排序规则信息 select id, i…

数据库 BUG：Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=

在mysql5中遇到的问题: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLICIT) for operation '=' 碰到个字符集问题. ---------------------------------- 当前,utf8_unicode_ci校对规则仅部分支持Unicode校对规则算法.一些字符还是不能支持.并且,不能完全支持组合的记号.这主要影响越南和俄罗斯的一些少数民族语言,…

Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLIC