MySQL中utf8字符集、排序规则及utf8mb4_bin列大小写不敏感方法

转载：https://my.oschina.net/u/1245414/blog/1831347html 1、utf8mb4 和 utf8 比较 utf8mb4: A UTF-8 encoding of the Unicode character set using one to four bytes per character.mysql utf8mb3: A UTF-8 encoding of

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