sql-statement-show-character-set.md

title	summary	aliases
SHOW CHARACTER SET	TiDB 数据库中 SHOW CHARACTER SET 的使用概况。	/docs-cn/dev/sql-statements/sql-statement-show-character-set/ /docs-cn/dev/reference/sql/statements/show-character-set/

SHOW CHARACTER SET

SHOW CHARACTER SET 语句提供 TiDB 中可用字符集的静态列表。此列表不反映当前连接或用户的任何属性。

语法图

ShowCharsetStmt ::=
    "SHOW" ( ("CHARACTER" | "CHAR") "SET" | "CHARSET" ) ShowLikeOrWhere?

ShowLikeOrWhere ::=
    "LIKE" SimpleExpr
|   "WHERE" Expression

示例

SHOW CHARACTER SET;

+---------+---------------+-------------------+--------+
| Charset | Description   | Default collation | Maxlen |
+---------+---------------+-------------------+--------+
| utf8    | UTF-8 Unicode | utf8_bin          |      3 |
| utf8mb4 | UTF-8 Unicode | utf8mb4_bin       |      4 |
| ascii   | US ASCII      | ascii_bin         |      1 |
| latin1  | Latin1        | latin1_bin        |      1 |
| binary  | binary        | binary            |      1 |
+---------+---------------+-------------------+--------+
5 rows in set (0.00 sec)

SHOW CHARACTER SET LIKE 'utf8%';

+---------+---------------+-------------------+--------+
| Charset | Description   | Default collation | Maxlen |
+---------+---------------+-------------------+--------+
| utf8    | UTF-8 Unicode | utf8_bin          |      3 |
| utf8mb4 | UTF-8 Unicode | utf8mb4_bin       |      4 |
+---------+---------------+-------------------+--------+
2 rows in set (0.00 sec)

SHOW CHARACTER SET WHERE Description='UTF-8 Unicode';

+---------+---------------+-------------------+--------+
| Charset | Description   | Default collation | Maxlen |
+---------+---------------+-------------------+--------+
| utf8    | UTF-8 Unicode | utf8_bin          |      3 |
| utf8mb4 | UTF-8 Unicode | utf8mb4_bin       |      4 |
+---------+---------------+-------------------+--------+
2 rows in set (0.00 sec)

MySQL 兼容性

SHOW CHARACTER SET 语句功能与 MySQL 完全兼容。注意，TiDB 中字符集的默认排序规则与 MySQL 有所不同，具体可以参考与 MySQL 兼容性对比。如发现任何兼容性差异，请尝试 TiDB 支持资源。

另请参阅

• SHOW COLLATION
• 字符集和排序规则