查询不包含指定表达式作为 UNION 查询中聚合函数的一部分

Question

我正在执行联合查询以将两个单独查询的结果相加，这两个查询为我提供了来自两个不同会计期间的数据，以获得 12 个月的滚动数字。 我收到消息“您的查询不包括指定的表达式“Report_Header”作为聚合函数的一部分”。我已经读到该字段需要包含在最后的 GROUP BY 语句中，但是当我从任一查询或两个查询中添加字段时，如下所示，我仍然收到消息。帮助？我不是程序员，我是Access用户，所以我需要简单：）。

SELECT [JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB].Report_Header,
       Sum([JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB].SumOfCASES) AS CASES,
       Sum([JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB].SumOfPurchases) AS PURCHASES
FROM [JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB]

UNION ALL

SELECT [JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2].Report_Header,
       Sum([JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2].SumOfCASES) AS CASES,
       Sum([JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2].SumOfPurchases) AS PURCHASES
FROM [JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2]
GROUP BY [JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB].Report_Header,
         [JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2].Report_Header

谢谢！

Answer 1

您可以聚合两个子查询：

SELECT [JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB].Report_Header,
       Sum([JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB].SumOfCASES) AS CASES,
       Sum([JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB].SumOfPurchases) AS PURCHASES
FROM [JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB]
GROUP BY [JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB].Report_Header

UNION ALL

SELECT [JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2].Report_Header,
       Sum([JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2].SumOfCASES) AS CASES,
       Sum([JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2].SumOfPurchases) AS PURCHASES
FROM [JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2]
GROUP BY [JOIN_IB_FREIGHT&PURCHASES_Rolling12_SUB2].Report_Header;

这可能是你想要的。但是，它不会在两个表的同一标题下合并信息。为此，最简单的方法可能是视图。

Answer 2

将GROUP BY [JOIN_IB_FREIGHT&PURCHASES_ROLLING12_SUB].Report_Header 放在第一个查询而不是第二个查询下方。