Linux环境下MySQL数据库大小写区分问题
1、Linux下mysql安装完后是默认:区分表名的大小写,不区分列名的大小写;2、用root帐号登录后,在/etc/my.cnf 中的[mysqld]后添
1、Linux下mysql安装完后是默认:区分表名的大小写,不区分列名的大小写;
2、用root帐号登录后,在/etc/my.cnf 中的[mysqld]后添加添加lower_case_table_names=1,重启MYSQL服务,这时已设置成功:不区分表名的大小写;
lower_case_table_names参数详解:
lower_case_table_names = 0
其中 0:区分大小写,1:不区分大小写
MySQL在Linux下数据库名、表名、列名、别名大小写规则是这样的:
1、数据库名与表名是严格区分大小写的;
2、表的别名是严格区分大小写的;
3、列名与列的别名在所有的情况下均是忽略大小写的;
4、变量名也是严格区分大小写的;
MySQL在Windows下都不区分大小写。
3、如果想在查询时区分字段值的大小写,则:字段值需要设置BINARY属性,,设置的方法有多种:
A、创建时设置:
CREATE TABLE T(
A VARCHAR(10) BINARY
);
B、使用alter修改:
ALTER TABLE `tablename` MODIFY COLUMN `cloname` VARCHAR(45) BINARY;
C、mysql table editor中直接勾选BINARY项。

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