折腾:
期间,去找找三个的区别。
utf8_unicode_ci vs utf8_bin vs utf8_general_ci
mysql – utf8_bin vs. utf_unicode_ci – Stack Overflow
mysql中utf8_bin、utf8_general_ci、utf8_general_cs编码区别 – huanleyan的专栏 – 博客频道 – CSDN.NET
mysql – What’s the difference between utf8_general_ci and utf8_unicode_ci – Stack Overflow
MySQL 5.5.3之后,应该用utf8mb4,而不是utf8
不过此处的mysql是5.1.3的,所以还是用utf8:
(RunningFast) ➜ RunningFast mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 604 Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. |
【总结】
- utf8_bin:用二进制直接比较
- utf8_general_ci:速度快一点(但是一般来说,性能差距极其小,可以忽略了),但是比较某些特殊的语言和字符时不是足够精确。
- utf8_unicode_ci:相对比较更加精确
一般来说,最好还是用utf8_unicode_ci
(除非你的CPU性能太低,否则没必要继续再用utf8_general_ci了)
注:
如果是MySQL 5.5.3:
则分别改为:
utf8_general_ci-》utf8mb4_general_ci
utf8_unicode_ci-》utf8mb4_unicode_ci
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