Question

只是尝试按两列分组选定的记录

SELECT FSB_ProcessItems.InvId,
       FSB_ProcessItems.ItemId,
       FSB_Processes.Code,
       Sum(FSB_ProcessItems.Qty),
       FSB_Processes.Date

FROM FSB_ProcessItems 
     INNER JOIN FSB_ProcessStudents ON FSB_ProcessItems.ProStudentId = FSB_ProcessStudents.ProStudentId
     INNER JOIN FSB_Processes ON FSB_Processes.ProcessId =  FSB_ProcessStudents.ProcessId 


GROUP BY FSB_ProcessItems.InvId, FSB_ProcessItems.ItemId

我有错误：

专栏＆＃39;＆＃39;在选择列表中无效，因为它不包含在聚合函数或GROUP BY子句中。

FSB_Processes.Code和FSB_Processes.Date

在尝试分组之前，正确选择了记录，所以我只是遇到分组问题

搜索解决方案，但由于我不能完全理解问题，因此没有太多运气

所以我正在寻找解释和解决方案。

Answer 1

您必须在group by子句中放入没有聚合函数的所有选定列

SELECT FSB_ProcessItems.InvId,
   FSB_ProcessItems.ItemId,
   FSB_Processes.Code,
   Sum(FSB_ProcessItems.Qty),
   FSB_Processes.Date

FROM FSB_ProcessItems 
 INNER JOIN FSB_ProcessStudents ON FSB_ProcessItems.ProStudentId =   FSB_ProcessStudents.ProStudentId
 INNER JOIN FSB_Processes ON FSB_Processes.ProcessId =  FSB_ProcessStudents.ProcessId 

GROUP BY FSB_ProcessItems.InvId, FSB_ProcessItems.ItemId, FSB_Processes.Date, FSB_Processes.Code

Answer 2

你需要决定你想要什么。如上所述，您应该从Date中取出SELECT和SELECT pi.InvId, pi.ItemId, Sum(pi.Qty) -- p.Code, p.Date FROM FSB_ProcessItems pi INNER JOIN FSB_ProcessStudents s ON pi.ProStudentId = s.ProStudentId INNER JOIN FSB_Processes p ON p.ProcessId = s.ProcessId GROUP BY pi.InvId, pi.ItemId;：

GROUP BY

如果您想为代码和/或日期分别添加一行，请将margin_Top包含在内。

SQL Group由两列组成

2 个答案: