MySQL的大小写问题_MySQL
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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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