Question

表[Event]有字段[ID]和[ReferenceEvent]。 [ReferenceEvent]是指[Event]上另一条记录的[ID]号。

表[BOM]包含[BlueprintID]和[EventID]字段。

我有一个查询[BOM]并在找到匹配[BlueprintID]的[Event.ID]和[ReferenceEvent]的记录时返回[BlueprintID]和[EventID]。

简单地说，此查询告诉我用于事件的蓝图是否也用于参考事件。这是[BOM匹配参考查询]。

然后，我只需将[BOM匹配参考查询]和LEFT JOIN [ReferenceEvent]返回到[BlueprintID]。这是[BOMReportQuery]。

到目前为止，一切都完美无缺！

最后，我将[BOMReportQuery]设置为报告的记录源。当我运行报告时，出现以下错误。

“指定的字段'Event.ID'可以引用SQL语句的FROM子句中列出的多个表。”

我通过仅删除LEFT Join到[BOM Match Ref Query]来测试[BOMReportQuery]。报告运行得很好。我还测试了直接为差异报告设置[BOM匹配参考查询]作为记录源。该报告完美无缺。出现错误的唯一情况是我加入两个报告并运行报告。当我查看查询数据结果时，只有在我运行报告时才会出现错误。

请帮忙。我傻眼了。我正在使用Access。

BOM匹配参考查询：

SELECT BOM.BlueprintID AS RefBlueprintID,
    BOM_1.EventID
FROM (
    BOM INNER JOIN BOM AS BOM_1
        ON BOM.BlueprintID = BOM_1.BlueprintID
    )
INNER JOIN Event
    ON (BOM.EventID = Event.ID)
        AND (BOM_1.EventID = Event.ReferenceEvent)
GROUP BY BOM.BlueprintID,
    BOM_1.EventID;

BOMReportQuery：

SELECT Event.Project,
    Event.Event AS Event1,
    Event.Assembly,
    PartQuery.FordPartNo,
    PartQuery.GMPartNo,
    Blueprint.Revision,
    PartQuery.CommonName,
    BOM.Quantity,
    Supplier.SupplierName,
    Blueprint.ID,
    PartQuery.SelectFit,
    BOM.SelectFitNote,
    DLookUp("IssueDate", "DA", "BlueprintID=" & [BlueprintID] & " AND SupplierID=1") AS InHouseIssueDate,
    IIf([InHouseIssueDate], True, False) AS Issued,
    [Project] & " " & [Event] & " " & [Assembly] & " at " & [Quantity] & "per" AS ProjectEventAssy,
    PartQuery.PrimaryPartNo,
    PartQuery.PrimaryPartName,
    BOM.BeginDate,
    BOM.EndDate,
    BOM.Printed,
    Event.ID,
    [BOM Match Ref Query].EventID
FROM (
    (
        (
            (
                BOM LEFT JOIN Event
                    ON BOM.EventID = Event.ID
                ) LEFT JOIN Blueprint
                ON BOM.BlueprintID = Blueprint.ID
            ) LEFT JOIN PartQuery
            ON Blueprint.PartID = PartQuery.ID
        ) LEFT JOIN Supplier
        ON PartQuery.SupplierID = Supplier.ID
    )
/*Error appears (on report only) when adding the following line*/
LEFT JOIN [BOM Match Ref Query]
    ON BOM.BlueprintID = [BOM Match Ref Query].RefBlueprintID
ORDER BY PartQuery.FordPartNoBase,
    PartQuery.FordPartNo,
    PartQuery.PrimaryPartNo;

运行报告时出现SQL Left Join错误

0 个答案: