Home Database Mysql Tutorial 让MySQL支持中文排序的实现方法

让MySQL支持中文排序的实现方法

Jun 07, 2016 pm 06:05 PM
mysql

编绎MySQL时一般以ISO-8859字符集作为默认的字符集,因此在比较过程中中文编码字符大小写转换造成了这种现象,一种解决方法是对于包含中文的字段加上binary属性,使之作为二进制比较

让MySQL支持中文排序

编绎MySQL时一般以ISO-8859字符集作为默认的字符集,因此在比较过程中中文编码字符大小写转换造成了这种现象,一种解决方法是对于包含中文的字段加上"binary"属性,使之作为二进制比较,
例如将"name char(10)"改成"name char(10)binary"。
编译MySQL时使用--with--charset=gbk 参数,这样MySQL就会直接支持中文查找和排序了。

mysql order by 中文 排序

在MySQL中,我们经常会对一个字段进行排序查询,但进行中文排序和查找的时候,对汉字的排序和查找结果往往都是错误的。 这种情况在MySQL的很多版本中都存在。
如果这个问题不解决,那么MySQL将无法实际处理中文。 出现这个问题的原因是因为MySQL在查询字符串时是大小写不敏感的,在编绎MySQL时一般以ISO-8859字符集作为默认的字符集,因此在比较过程中中文编码字符大小写转换造成了这种现象。
解决方法:
对于包含中文的字段加上"binary"属性,使之作为二进制比较,例如将"name char(10)"改成"name char(10)binary"。
如果你使用源码编译MySQL,可以编译MySQL时使用 --with--charset=gbk 参数,这样MySQL就会直接支持中文查找和排序了(默认的是latin1)。也可以用 extra-charsets=gb2312,gbk 来加入多个字符集。
如果不想对表结构进行修改或者重新编译MySQL,也可以在查询语句的 order by 部分使用 CONVERT 函数。比如 select * from mytable order by CONVERT(chineseColumnName USING gbk);

UTF8 默认校对集是 utf8_general_ci , 它不是按照中文来的。你需要强制让MySQL按中文来排序。

select * from core_vender_info order by convert(vender_abbrev USING gbk) COLLATE gbk_chinese_ci
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