如何将 MySQL 数据库字符集和排序规则转换为 UTF-8?
mysqlmysqli database更新于 2024/1/24 16:56:00
首先，我们将借助 version() 函数检查当前正在使用的 MySQL 版本 −
查询如下 −
mysql> SELECT version();
以下是输出 −
+-----------+ | version() | +-----------+ | 8.0.12 | +-----------+ 1 row in set (0.00 sec)
如您在上面的输出中看到的那样，正在使用版本 8.0.12。现在，我们可以使用以下语法检查当前的字符编码 −
SELECT CCSA.character_set_name FROM information_schema.`TABLES`T,information_schema.`COLLATION_CHARACTER_SET_APPLICABILITY` CCSA WHERE CCSA.collation_name -> =T.table_collation AND T.table_schema = "yourDatabaseName" AND T.table_name = "yourTableName";
应用上述查询 −
mysql> SELECT CCSA.character_set_name FROM information_schema.`TABLES`T,information_schema.`COLLATION_CHARACTER_SET_APPLICABILITY` CCSA WHERE CCSA.collation_name -> =T.table_collation AND T.table_schema = "sample" AND T.table_name = "mytable";
输出结果如下:
+--------------------+ | CHARACTER_SET_NAME | +--------------------+ | utf8mb4 | +--------------------+ 1 row in set (0.00 sec)
下面是我们为数据库设置 utf8 的查询 −
mysql> ALTER DATABASE sample CHARACTER SET utf8 COLLATE utf8_general_ci; Query OK, 1 row affected, 1 warning (0.27 sec)
让我们检查一下 −
mysql> SELECT CCSA.character_set_name FROM information_schema.`TABLES`T,information_schema.`COLLATION_CHARACTER_SET_APPLICABILITY` CCSA WHERE CCSA.collation_name -> =T.table_collation AND T.table_schema = "sample" AND T.table_name = "mytable";
以下是输出 −
+--------------------+ | CHARACTER_SET_NAME | +--------------------+ | utf8mb4 | +--------------------+ 1 row in set (0.00 sec)
