MS Access SQL：将 SELECT INTO 与 UNION ALL 查询一起使用

Question

我正在尝试将一个已经在工作的 UNION 查询转换为一个 SELECT INTO 作为一组临时表的 VBA 过程的一部分。我这样做是因为 Access 存在性能问题。

当我尝试运行此查询并插入 INTO 子句时，出现此错误：

"An action query cannot be used as a row source."

我不完全确定为什么我不能执行它或如何在不创建更多查询的情况下绕过它。是什么原因造成的，我该如何解决？

SELECT DISTINCT A.*
FROM (SELECT DISTINCT
C.[CUSTOMER CODE], 
D.[FISCAL DAY], 
D.[TY INVOICE DATE] AS [Invoice Date], 
C.[CUSTOMER CODE]&" - "&D.[FISCAL DAY] AS CONCAT, 
IIF(D.[TY INVOICE DATE] Is Not Null, 'TY', Null) As TYLY

***INTO [FD CUST Missing- Temp]***

FROM [QR- CUST FD] AS C,
[QR- FD SALES] AS D) AS A

LEFT JOIN [QR- CUST FD] AS C
ON C.[FD CONCAT] = A.[CONCAT]
WHERE C.[FD CONCAT] Is Null

UNION ALL 

SELECT DISTINCT 
A.*

***INTO [FD Cust Missing- Temp]***

FROM (SELECT DISTINCT
C.[CUSTOMER CODE],
D.[FISCAL DAY],
D.[LY INVOICE DATE] AS [Invoice Date], 
C.[CUSTOMER CODE]&" - "&D.[FISCAL DAY] AS CONCAT, 
IIF(D.[LY INVOICE DATE] Is Not Null, 'LY', Null) As TYLY

FROM [QR- CUST FD] AS C,
[QR- FD SALES] AS D)  AS A

LEFT JOIN [QR- CUST FD] AS C
ON C.[FD CONCAT] = A.[CONCAT]
WHERE C.[FD CONCAT] IS NULL

;

Answer 1

您遇到错误

An action query cannot be used as a row source.

因为 SELECT ... INTO NewTableName FROM ... 查询是 操作查询 （如 INSERT、UPDATE 或 DELETE 查询），它不 return 结果集。因此 UNION ALL 没有任何作用。因此，例如，这将不起作用（导致上述错误消息）：

    SELECT DISTINCT LastName 
    INTO Foo 
    FROM Clients 
    WHERE LastName LIKE 'D*'
UNION ALL
    SELECT DISTINCT LastName 
    INTO Foo 
    FROM Clients 
    WHERE LastName LIKE 'T*'

但是，您可以按如下方式重新组织该查询，这确实有效：

SELECT *
INTO Foo
FROM
    (
        SELECT DISTINCT LastName 
        FROM Clients 
        WHERE LastName LIKE 'D*'
    UNION ALL
        SELECT DISTINCT LastName 
        FROM Clients 
        WHERE LastName LIKE 'T*'
    )

MS Access SQL：将 SELECT INTO 与 UNION ALL 查询一起使用

MS Access SQL: Using SELECT INTO with a UNION ALL query

sql

vba

ms-access-2010

union-all

select-into