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  • 2. CHARACTER_SETS

    2. CHARACTER_SETS

    CHARACTER_SETS表提供有关可用字符集的信息。 下表中的SHOW Name值对应于SHOW CHARACTER SET语句的列名。

    INFORMATION_SCHEMA Name SHOW Name Remarks
    CHARACTER_SET_NAME Charset
    DEFAULT_COLLATE_NAME Default collation
    DESCRIPTION Description MySQL extension
    MAXLEN Maxlen MySQL extension

    CHARACTER_SETS包含以下列:

    • CHARACTER_SET_NAME:字符集名称
    • DEFAULT_COLLATE_NAME:字符集默认排序规则
    • DESCRIPTION:字符集的描述
    • MAXLEN:存储一个字符所需的最大字节数。

    示例

    mysql> SELECT * FROM INFORMATION_SCHEMA.CHARACTER_SETS WHERE CHARACTER_SET_NAME LIKE 'utf8';
    +--------------------+----------------------+---------------+--------+
    | CHARACTER_SET_NAME | DEFAULT_COLLATE_NAME | DESCRIPTION   | MAXLEN |
    +--------------------+----------------------+---------------+--------+
    | utf8               | utf8_general_ci      | UTF-8 Unicode |      3 |
    +--------------------+----------------------+---------------+--------+
    1 row in set (0.00 sec)
    
    
    mysql> show character set like 'utf8';
    +---------+---------------+-------------------+--------+
    | Charset | Description   | Default collation | Maxlen |
    +---------+---------------+-------------------+--------+
    | utf8    | UTF-8 Unicode | utf8_general_ci   |      3 |
    +---------+---------------+-------------------+--------+
    1 row in set (0.00 sec)
    
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  • 原文地址:https://www.cnblogs.com/wanbin/p/9514623.html
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