Question

我有这样的查询：

SELECT Temp.description FROM (
    (
        SELECT Clients.aliasname AS description 
        FROM ClientBilling 
        INNER JOIN [B2BSetups].[dbo].Clients ON Clients.cno = ClientBilling.cno 
        WHERE programmerCreditDate >= '11/1/2016' 
            AND programmerCreditDate < '11/29/2016' 
            AND (ClientBilling.programmer='e21' or Clients.admin='e21' or Clients.setup='e21')
    )
    UNION ALL 
    (
        SELECT Clients.aliasname + ' - ' + TradingPartners.aliasname as description 
        FROM RelationshipBilling 
        INNER JOIN [B2BSetups].[dbo].TPRelationships ON TPRelationships.relno = RelationshipBilling.relno 
        INNER JOIN [B2BSetups].[dbo].Clients ON Clients.cno = TPRelationships.cno 
        INNER JOIN [B2BSetups].[dbo].TradingPartners ON TradingPartners.tpno = TPRelationships.tpno 
        WHERE programmerCreditDate >= '11/1/2016' 
            AND programmerCreditDate < '11/29/2016' 
            AND (RelationshipBilling.programmer='e21' or Clients.admin='e21' or Clients.setup='e21')
    )           
    UNION ALL 
    (
        SELECT Clients.aliasname + ' - ' + TradingPartners.aliasname + ' - ' + RelDocs.document as description 
        FROM DocumentBilling 
        INNER JOIN [B2BSetups].[dbo].RelDocs ON RelDocs.recid = DocumentBilling.docno 
        INNER JOIN [B2BSetups].[dbo].TPRelationships ON TPRelationships.relno = RelDocs.relno 
        INNER JOIN [B2BSetups].[dbo].Clients ON Clients.cno = TPRelationships.cno 
        INNER JOIN [B2BSetups].[dbo].TradingPartners ON TradingPartners.tpno = TPRelationships.tpno 
        WHERE programmerCreditDate >= '11/1/2016' AND programmerCreditDate < '11/29/2016' 
            AND (DocumentBilling.programmer='e21' or Clients.admin='e21' or Clients.setup='e21')
    )
) AS Temp 
ORDER BY description;

我正在尝试检索RelationshipBilling.billedAmount，但是，这仅适用于第二个/第三个选择查询作为顶级关系。内部联接需要relno到必要的表。

有没有办法检索这些结果，无论它们是否为空（因为有些结果都是）？

Answer 1

只需在联合中的第一个查询中添加一个虚拟字段，与真实字段的数据类型相同。cast(null as decimal(9,2)) as billedAmount 然后将billedAmount添加到其他两个查询中。

Answer 2

这是你需要的吗？

   SELECT Clients.aliasname +Temp.description  AS description,billedAmount FROM 
    (


        SELECT RelationshipBilling.programmer,TPRelationships.cno , ' - ' + TradingPartners.aliasname as description ,RelationshipBilling.billedAmount
        FROM RelationshipBilling 
        INNER JOIN [B2BSetups].[dbo].TPRelationships ON TPRelationships.relno = RelationshipBilling.relno 
        INNER JOIN [B2BSetups].[dbo].TradingPartners ON TradingPartners.tpno = TPRelationships.tpno 
        WHERE programmerCreditDate >= '11/1/2016' AND programmerCreditDate < '11/29/2016' 

        UNION ALL 
        SELECT ClientBilling.programmer, ClientBilling.cno,'' AS description,CONVERTNULL AS billedAmount FROM ClientBilling 
        WHERE programmerCreditDate >= '11/1/2016' AND programmerCreditDate < '11/29/2016' 
        UNION ALL 
        SELECT DocumentBilling.programmer,TPRelationships.cno, ' - ' + TradingPartners.aliasname + ' - ' + RelDocs.document as description ,NULL AS billedAmount
        FROM DocumentBilling 
        INNER JOIN [B2BSetups].[dbo].RelDocs ON RelDocs.recid = DocumentBilling.docno 
        INNER JOIN [B2BSetups].[dbo].TPRelationships ON TPRelationships.relno = RelDocs.relno 
        INNER JOIN [B2BSetups].[dbo].TradingPartners ON TradingPartners.tpno = TPRelationships.tpno 
        WHERE programmerCreditDate >= '11/1/2016' AND programmerCreditDate < '11/29/2016' 


    ) AS Temp 
    INNER JOIN [B2BSetups].[dbo].Clients ON Clients.cno = Temp.cno 
    WHERE 'e21' IN (Clients.setup,Clients.admin,temp.programmer)
    ORDER BY description;

Answer 3

您可以将0 as billedAmount放在第一个查询中，与第二个/第三个查询的顺序相同。

如何从UNION ALL查询结果的子集中获取结果集

3 个答案: