mysql - MySQL compare emails and match even if one upper the other lowercase

Question

I try to compare MySQL strings and want to make sure they match even if the one entered is upper case and the one inside my database is lower case. How can I do this "comparison" inside an SQL statement?

Cheers, -lony

Answer 1

SELECT * FROM yourtable WHERE LOWER(col1)=LOWER(col2);

Answer 2

将机器人字符串更改为LOWER()orUPPER()然后比较

Answer 3

不要做任何LOWER()or UPPER()，只需使用不区分大小写的排序规则，您可能已经这样做了。如果你不这样做，我会使用utf8_unicode_ci- 排序规则名称中的 ci 代表“不区分大小写”。