---
title: "GROUP_CONCAT - OceanBase 数据库 V4.2.1 | OceanBase 文档中心"
description: "GROUP_CONCAT 声明 GROUP_CONCAT([DISTINCT] expr [,expr ...] [ORDER BY {unsigned_integer | col_name | expr} [ASC | DESC] [,col_name ...]] [SEPARATOR str_val]) 说明 返…"
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---
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文档反馈![](https://mdn.alipayobjects.com/huamei_22khvb/afts/img/A*P8CuR4UJ_FkAAAAAAAAAAAAADiGDAQ/original) OceanBase 数据库分布式版 - V 4.2.1 LTS

# GROUP_CONCAT

更新时间：2026-07-15 20:56:55

[编辑](https://github.com/oceanbase/oceanbase-doc/edit/V4.2.1/zh-CN/700.reference/500.sql-reference/100.sql-syntax/200.common-tenant-of-mysql-mode/400.functions-of-mysql-mode/300.aggregate-function-of-mysql-mode/700.group-concat-agg-of-mysql-mode.md)  

## 声明

```sql
GROUP_CONCAT([DISTINCT] expr [,expr ...]
             [ORDER BY {unsigned_integer | col_name | expr}
                 [ASC | DESC] [,col_name ...]]
             [SEPARATOR str_val])

```

## 说明

返回带有来自一个组的连接的非 `NULL` 值的字符串结果。

- `ORDER BY` 用于指定排序列，`ASC` 表示生序排列，`DESC` 表示降序排列，默认为 `ASC`。
 - `SEPARATOR` 用于指定连接字符串间的分隔符，默认分隔符为 `,`。

## 示例

```sql
obclient> SELECT * FROM book;     //表book（书编号，书名，出版社）
+--------+--------------------------------+-----------------------------+
| bookid | bookname                       | publishname                 |
+--------+--------------------------------+-----------------------------+
|      1 | git help                       | alibaba group publisher     |
|      2 | MySQL性能优化                  | 浙江大学图文出版社          |
|      3 | JAVA编程指南                   | 机械工业出版社              |
|      3 | JAVA编程指南                   | 机械工业出版社              |
|      4 | 大规模分布式存储系统           | 机械工业出版社              |
+--------+--------------------------------+-----------------------------+
5 rows in set

//查找书名信息
obclient> SELECT GROUP_CONCAT(bookname) FROM book GROUP BY bookname;
+-----------------------------------+
| GROUP_CONCAT(bookname)            |
+-----------------------------------+
| git help                          |
| JAVA编程指南,JAVA编程指南         |
| MySQL性能优化                     |
| 大规模分布式存储系统              |
+-----------------------------------+
4 rows in set

//查找书名信息，书名唯一
obclient> SELECT GROUP_CONCAT(distinct(bookname)) FROM book GROUP BY bookname;
+----------------------------------+
| GROUP_CONCAT(distinct(bookname)) |
+----------------------------------+
| git help                         |
| JAVA编程指南                     |
| MySQL性能优化                    |
| 大规模分布式存储系统             |
+----------------------------------+
4 rows in set

//查找书名和出版社信息，以书名分组，出版社信息降序排序显示
obclient> SELECT bookname, GROUP_CONCAT(publishname ORDER BY publishname DESC SEPARATOR ';' ) FROM book GROUP BY bookname;
+--------------------------------+---------------------------------------------------------------------+
| bookname                       | GROUP_CONCAT(publishname ORDER BY publishname DESC SEPARATOR ';' ) |
+--------------------------------+---------------------------------------------------------------------+
| git help                       | alibaba group publisher                                             |
| JAVA编程指南                   | 机械工业出版社;机械工业出版社                                       |
| MySQL性能优化                  | 浙江大学图文出版社                                                  |
| 大规模分布式存储系统           | 机械工业出版社                                                      |
+--------------------------------+---------------------------------------------------------------------+
4 rows in set

```

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