Question

我有一个非常像这样的查询：

SELECT * FROM t1 LEFT JOIN t2 ON t1.aNumber = t2.aNumber;

当我尝试运行它时，我得到Invalid Operation。以下两个查询运行正常：

SELECT * FROM t1;
SELECT * FROM t2;

所以我猜这个问题是非常明显还是非常复杂......在这种情况下如何找到问题呢？

为了完整性，这里是实际查询（Query25）以及它引用的所有其他查询：

Query25

SELECT *
FROM [EXPORT PRICE AND Desc] LEFT JOIN Export_Union_active ON [EXPORT PRICE AND Desc].MaterialNumber = Export_Union_active.MaterialNumber;

出口价格和描述

SELECT tblMMMaterials.MaterialNumber, tblMMMaterials.MaterialDescription AS name, Format(tblMMMaterials!SellingPrice,"Standard") AS SellingPrice, dbo_tblMMImages.Notes, tblMMMaterials.MFG, tblMMMaterials.Internet
FROM tblMMMaterials LEFT JOIN dbo_tblMMImages ON tblMMMaterials.MaterialID = dbo_tblMMImages.MaterialID
WHERE (((tblMMMaterials.Internet)=True));

Export_Union_active

select * from Export_Active  UNION ALL select  * from Export_Inactive;

Export_Active

SELECT tblMMMaterials.MaterialNumber, tblMMMaterials.Discontinued, 1 AS [check], tblMMMaterials.MFG
FROM tblMMMaterials
WHERE (((tblMMMaterials.Discontinued)=0) AND ((tblMMMaterials.MFG)="kheops"));

Export_Inactive

SELECT tblMMMaterials.MaterialNumber, tblMMMaterials.Discontinued, 0 AS [check], tblMMMaterials.MFG
FROM tblMMMaterials
WHERE (((tblMMMaterials.Discontinued)=1) AND ((tblMMMaterials.MFG)="kheops"));

以下是所有这些查询所引用的表格（它们比这大得多，但我删除了任何查询中未使用的内容）：

tblMMMaterials

MaterialID          | Number   | PK
MaterialNumber      | Text
MaterialDescription | Text
SellingPrice        | Currency
MFG                 | Text
Internet            | Yes/No
Discontinued        | Yes/No

tblMMImages

ImageID    | AutoNumer | PK
MaterialID | Number
Notes      | Memo

为什么我的LEFT JOIN操作无效（MS ACCESS 2003）

0 个答案: