要将MySQL 数据库中的字符集从 utf8mb3 改成 utf8mb4,你需要按照以下步骤进行操作。这些步骤将确保你的数据库能够支持更广泛的 Unicode 字符,包括 Emoji 表情等。 1. 确认 MySQL 版本支持 utf8mb4 字符集 首先,你需要确认你的 MySQL 数据库版本是否支持 utf8mb4。MySQL 在 5.5.3 版本之后增加了对 utf8mb...
在这个例子中,User表和Product表都需要将utf8mb3转换为utf8mb4。 转换步骤 1. 备份数据 在进行任何大的更改之前,请务必备份目前的数据库,以防万一。 mysqldump-u username-p--default-character-set=utf8mb3 database_name > backup.sql 1. 2. 修改数据库字符集 在你准备好进行转换后,首先更改数据库的默认...
步骤三:执行修改字符集的SQL语句 修改为utf8mb3 -- 修改表的字符集为utf8mb3ALTERTABLEtable_nameCONVERTTOCHARACTERSETutf8mb3COLLATEutf8mb3_general_ci; 1. 2. 修改为utf8mb4 -- 修改表的字符集为utf8mb4ALTERTABLEtable_nameCONVERTTOCHARACTERSETutf8mb4COLLATEutf8mb4_general_ci; 1. 2. 结论 通过以上...
ALTERTABLEtable_nameCONVERTTOCHARACTERSETutf8mb4 COLLATE utf8mb4_unicode_ci; # Update colume (一般修改表就会同步表内列字符集,不过也有遇到过列还仍然是utf8的情况) ALTERTABLEtable_name CHANGE field fieldVARCHAR(64)CHARACTERSETutf8mb4 COLLATE utf8mb4_unicode_ci; !! 如果上述Sql无法修改列则使用以下...
伽蓝幻梦151 声望
Theutf8mb3character set is deprecated and will be removed in a future MySQL version. Please useutf8mb4instead. SQL Syntax Notes Incompatible Change:The deprecatedASCorDESCqualifiersforGROUP BYclauseshave been removed. Queries that previously relied onGROUP BYsorting may produce results that differ fro...
上一篇讲到字符、字符集、字符编码，粗略的一笔带过MySQL的编码，本篇想要讲讲字符编码在MySQL数据库中...
Long time MySQL users will recognize that there are two varieties of utf8 support in MySQL; utf8mb3 and utf8mb4. Let me dig a little bit deeper in explaining the history between the two: MySQL 4.1 (2004) was the first version to support character sets and collations. The default ...
Suppose that you have a TINYTEXT column that uses utf8mb3 but must be able to contain more than 63 characters. You cannot convert it to utf8mb4 unless you also change the data type to a longer type such as TEXT. Similarly, a very long VARCHAR column may need to be changed to one...
#1 在my.ini里指定服务器的字符集为utf8mb4，排序规则为utf8mb4_unicode_ci。