1d9b3aeee7
The error format '##keyword' in a lot of docs. This pr is to repair document format. #4335
1.7 KiB
1.7 KiB
title, language
| title | language |
|---|---|
| group_concat | zh-CN |
group_concat
description
Syntax
VARCHAR group_concat(VARCHAR str[, VARCHAR sep])
该函数是类似于 sum() 的聚合函数，group_concat 将结果集中的多行结果连接成一个字符串。第二个参数 sep 为字符串之间的连接符号，该参数可以省略。该函数通常需要和 group by 语句一起使用。
example
mysql> select value from test;
+-------+
| value |
+-------+
| a |
| b |
| c |
+-------+
mysql> select group_concat(value) from test;
+-----------------------+
| group_concat(`value`) |
+-----------------------+
| a, b, c |
+-----------------------+
mysql> select group_concat(value, " ") from test;
+----------------------------+
| group_concat(`value`, ' ') |
+----------------------------+
| a b c |
+----------------------------+
keyword
GROUP_CONCAT,GROUP,CONCAT