Home Database Mysql Tutorial MySQL的大小写问题_MySQL

MySQL的大小写问题_MySQL

Jun 01, 2016 pm 01:18 PM
linux windows data

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MySQL在linux下数据库、表名、列名、别名的规则:

1.数据库名与表名是严格区分大小写;

2.表的别名是严格区分大小写的;

3.变量名严格区分大小写;

4.列名与列的别名忽略大小写。

MySQL在windows下不区分大小写。

原因:

MySQL在查询字符串时是大小写不敏感的,在编译MySQL时一般以ISO-8859字符集座位默认的字符集,这个字符集对大小写不敏感,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。

解决办法:

1.表名区分大小写;

在my.conf加入

ower_case_table_names = 0

0:区分大小写 1:不区分大小写

2.字段值设置BINARY属性

就可区分大小写

下边是我在项目中所遇到的问题:

前几天在做项目时(Linux环境),无意间手一抖,创建了两个表名相同的数据库,而在写SQL查询数据库时,会出现

select * from swxx_zxwd 和 select * from SWXX_ZXWD

两种不同的结果。

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