MySQL 结果为逗号分隔列表

MySQL Results as comma separated list(MySQL 结果为逗号分隔列表)

问题描述

我需要运行如下查询:

SELECT p.id, p.name, 
       (SELECT name 
          FROM sites s 
         WHERE s.id = p.site_id) AS site_list
  FROM publications p

但我希望子选择返回一个逗号分隔的列表，而不是一列数据.这甚至可能吗，如果可以，怎么办?

But I'd like the sub-select to return a comma separated list, instead of a column of data. Is this even possible, and if so, how?

推荐答案

您可以使用 GROUP_CONCAT 来执行，例如类似的东西

You can use GROUP_CONCAT to perform that, e.g. something like

SELECT p.id, p.name, GROUP_CONCAT(s.name) AS site_list
FROM sites s
INNER JOIN publications p ON(s.id = p.site_id)
GROUP BY p.id, p.name;

这篇关于MySQL 结果为逗号分隔列表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！