Question

我有两个相关的表，“project”和“projects_formats”by projectID。

我需要一个可以为我提供项目的查询，并且每行我想要连接这个项目所需的格式集。

现在，我的查询是：

SELECT SQL_CALC_FOUND_ROWS
       f.*,
       CONCAT(f.formatID, ', ') as formats
FROM projects as p INNER JOIN project_formats as f ON f.projectID=p.ID 
WHERE p.ended=0
GROUP BY f.projectID

这可能吗？

Answer 1

而不是CONCAT，请尝试GROUP_CONCAT：

SELECT SQL_CALC_FOUND_ROWS
       f.*,
       GROUP_CONCAT(f.formatID SEPARATOR ', ') as formats
FROM projects as p INNER JOIN project_formats as f ON f.projectID=p.ID 
WHERE p.ended=0
GROUP BY f.projectID

Concat分组记录

1 个答案: