---
title: "COLLATION - OceanBase 数据库 V4.2.2 | OceanBase 文档中心"
description: COLLATION 声明 COLLATION(str) 说明 返回字符串 str 的字符序。 您可以通过 SHOW COLLATION 语句查看 OceanBase 数据库支持的字符序。 示例 obclient> SELECT COLLATION("oceanbase"); +--------------------…
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---
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# COLLATION

更新时间：2026-04-10 11:58:36

[编辑](https://github.com/oceanbase/oceanbase-doc/edit/V4.2.2/zh-CN/700.reference/500.sql-reference/100.sql-syntax/200.common-tenant-of-mysql-mode/400.functions-of-mysql-mode/600.information-functions-of-mysql-mode/400.collation-info-of-mysql-mode.md)  

## 声明

```sql
COLLATION(str)

```

## 说明

返回字符串 `str` 的字符序。

您可以通过 `SHOW COLLATION` 语句查看 OceanBase 数据库支持的字符序。

## 示例

```sql
obclient> SELECT COLLATION("oceanbase");
+------------------------+
| COLLATION("oceanbase") |
+------------------------+
| utf8mb4_general_ci     |
+------------------------+
1 row in set

obclient> SELECT COLLATION("oceanbase" COLLATE utf8mb4_bin);
+--------------------------------------------+
| COLLATION("oceanbase" COLLATE utf8mb4_bin) |
+--------------------------------------------+
| utf8mb4_bin                                |
+--------------------------------------------+
1 row in set

```

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