我收到此错误，我不确定如何修复它。我试图决定@type =一件事是从那个临时表中选择一切。有2个临时表，所以有2个选择。 还有第三种选择，他们可以选择两个表，我正在一起工作。 堆栈溢出错误的解释似乎不合适，因为我之前使用过它并且它起作用（至少是union部分）。 作为旁注，我想在工会部分做一个order by子句，但它不会让我。有没有办法做到这一点？ 继承人导致错误的部分。两个临时表在单独运行时工作正常，但不能通过此select语句运行。我正在使用sql server 2005
Select
Case
WHEN @type like 'Sent%' THEN
(Select * from #Sent)
WHEN @Type like 'Confirm%' THEN
(Select * From #Confirmed)
Else
( Select
T.QT#
,T.QTLine
,T.DIVISION
,T.Customer
,T.CustomerAccount
,T.Industry
,T.Type
,T.ProgramName
,T.SalesGroup
,T.Recipient
,T.ItemGroup
,T.OEM
,T.CustomerClassification
,T.Finish
,T.Item
,T.EAU
,T.PriceUnit
,T.Price
,T.ExtValue
,T.VMPercent
,T.VM$
,T.RFQRecdTime
,T.SentTime
,T.QuotationToSentTurnTime
,T.RFQRecdDate
,T.SentDate
,T.ConfirmedDate
,T.QuotetoOrderTurnTime
,T.FiscalMonthSent
,T.FiscalMonthConfirmed
,T.Status
FROM
(
Select
QT#
,QTLine
,DIVISION
,Customer
,CustomerAccount
,Industry
,[Type]
,ProgramName
,SalesGroup
,Recipient
,ItemGroup
,[OEM]
,CustomerClassification
,Finish
,Item
,EAU
,PriceUnit
,Price
,ExtValue
,VMPercent
,VM$
,RFQRecdTime
,SentTime
,QuotationToSentTurnTime
,RFQRecdDate
,SentDate
,ConfirmedDate
,QuotetoOrderTurnTime
,FiscalMonthSent
,FiscalMonthConfirmed
,[Status]
From
#Sent
UNION ALL
Select
QT#
,QTLine
,DIVISION
,Customer
,CustomerAccount
,Industry
,[Type]
,ProgramName
,SalesGroup
,Recipient
,ItemGroup
,[OEM]
,CustomerClassification
,Finish
,Item
,EAU
,PriceUnit
,Price
,ExtValue
,VMPercent
,VM$
,RFQRecdTime
,SentTime
,QuotationToSentTurnTime
,RFQRecdDate
,SentDate
,ConfirmedDate
,QuotetoOrderTurnTime
,FiscalMonthSent
,FiscalMonthConfirmed
,[Status]
From
#Confirmed
) T
GROUP BY
T.QT#
,T.QTLine
,T.DIVISION
,T.Customer
,T.CustomerAccount
,T.Industry
,T.Type
,T.ProgramName
,T.SalesGroup
,T.Recipient
,T.ItemGroup
,T.OEM
,T.CustomerClassification
,T.Finish
,T.Item
,T.EAU
,T.PriceUnit
,T.Price
,T.ExtValue
,T.VMPercent
,T.VM$
,T.RFQRecdTime
,T.SentTime
,T.QuotationToSentTurnTime
,T.RFQRecdDate
,T.SentDate
,T.ConfirmedDate
,T.QuotetoOrderTurnTime
,T.FiscalMonthSent
,T.FiscalMonthConfirmed
,T.Status
答案 0 :(得分：0)
我用If ... else
替换了case语句 IF @Type like 'Sent%'
(SELECT
QT#
,QTLine
,DIVISION
,Customer
,CustomerAccount
,Industry
,[Type]
,ProgramName
,SalesGroup
,Recipient
,ItemGroup
,[OEM]
,CustomerClassification
,Finish
,Item
,EAU
,PriceUnit
,Price
,ExtValue
,VMPercent
,VM$
,RFQRecdTime
,SentTime
,QuotationToSentTurnTime
,RFQRecdDate
,SentDate
,ConfirmedDate
,QuotetoOrderTurnTime
,FiscalMonthSent
,FiscalMonthConfirmed
,[Status]
FROM #Sent)
IF @Type like 'Confirm%'
(SELECT
QT#
,QTLine
,DIVISION
,Customer
,CustomerAccount
,Industry
,[Type]
,ProgramName
,SalesGroup
,Recipient
,ItemGroup
,[OEM]
,CustomerClassification
,Finish
,Item
,EAU
,PriceUnit
,Price
,ExtValue
,VMPercent
,VM$
,RFQRecdTime
,SentTime
,QuotationToSentTurnTime
,RFQRecdDate
,SentDate
,ConfirmedDate
,QuotetoOrderTurnTime
,FiscalMonthSent
,FiscalMonthConfirmed
,[Status] FROM #Confirmed)
ELSE
( SELECT
T.QT#
,T.QTLine
,T.DIVISION
,T.Customer
,T.CustomerAccount
,T.Industry
,T.Type
,T.ProgramName
,T.SalesGroup
,T.Recipient
,T.ItemGroup
,T.OEM
,T.CustomerClassification
,T.Finish
,T.Item
,T.EAU
,T.PriceUnit
,T.Price
,T.ExtValue
,T.VMPercent
,T.VM$
,T.RFQRecdTime
,T.SentTime
,T.QuotationToSentTurnTime
,T.RFQRecdDate
,T.SentDate
,T.ConfirmedDate
,T.QuotetoOrderTurnTime
,CONVERT(VarChar,T.FiscalMonthSent) As FiscalMonthSent
,CONVERT(VARCHAR,T.FiscalMonthConfirmed) AS FiscalMonthConfirmed
,T.Status
FROM
(
SELECT
QT#
,QTLine
,DIVISION
,Customer
,CustomerAccount
,Industry
,[Type]
,ProgramName
,SalesGroup
,Recipient
,ItemGroup
,[OEM]
,CustomerClassification
,Finish
,Item
,EAU
,PriceUnit
,Price
,ExtValue
,VMPercent
,VM$
,RFQRecdTime
,SentTime
,QuotationToSentTurnTime
,RFQRecdDate
,SentDate
,ConfirmedDate
,QuotetoOrderTurnTime
,CONVERT(VarChar,FiscalMonthSent) AS FiscalMonthSent
,CONVERT(VarChar,FiscalMonthConfirmed) AS FiscalMonthConfirmed
,[Status]
FROM
#Sent
UNION ALL
SELECT
QT#
,QTLine
,DIVISION
,Customer
,CustomerAccount
,Industry
,[Type]
,ProgramName
,SalesGroup
,Recipient
,ItemGroup
,[OEM]
,CustomerClassification
,Finish
,Item
,EAU
,PriceUnit
,Price
,ExtValue
,VMPercent
,VM$
,RFQRecdTime
,SentTime
,QuotationToSentTurnTime
,RFQRecdDate
,SentDate
,ConfirmedDate
,QuotetoOrderTurnTime
,CONVERT(VarChar,FiscalMonthSent) AS FiscalMonthSent
,CONVERT(VarChar,FiscalMonthConfirmed) AS FiscalMonthConfirmed
,[Status]
FROM
#Confirmed
) T
GROUP BY
T.QT#
,T.QTLine
,T.DIVISION
,T.Customer
,T.CustomerAccount
,T.Industry
,T.Type
,T.ProgramName
,T.SalesGroup
,T.Recipient
,T.ItemGroup
,T.OEM
,T.CustomerClassification
,T.Finish
,T.Item
,T.EAU
,T.PriceUnit
,T.Price
,T.ExtValue
,T.VMPercent
,T.VM$
,T.RFQRecdTime
,T.SentTime
,T.QuotationToSentTurnTime
,T.RFQRecdDate
,T.SentDate
,T.ConfirmedDate
,T.QuotetoOrderTurnTime
,T.FiscalMonthSent
,T.FiscalMonthConfirmed
,T.Status
)
答案 1 :(得分：0)
您可以使用两个SELECT的单个并集来满足所有三种情况。
基本上，您希望在参数为#Sent时读取LIKE 'Sent%'，或者在不 LIKE 'Confirm%'时读取其他内容，同时#Confirmed 1}}：参数应该是LIKE 'Confirm%'或不是 LIKE 'Sent%'。
所以，这就是你的查询的样子：
SELECT
QT#,
...
FROM #Sent
WHERE @type LIKE 'Sent%'
OR @type NOT LIKE 'Confirm%'
UNION
SELECT
QT#,
...
FROM #Confirmed
WHERE @type LIKE 'Confirm%'
OR @type NOT LIKE 'Sent%'
;
请注意，@type的第三个值或模式不应该为NULL。如果它可以为NULL并且NULL应该与两个表匹配，那么您需要通过替换
... OR @type NOT LIKE ...
类似
... OR ISNULL(@type, '') NOT LIKE ...
请注意，GROUP BY没有使用，UNION代替UNION ALL。在您的查询中，您使用从每个表中提取的相同列对组合集进行分组，并且最终在输出中返回相同的列。我的理解是该方法应该消除两个表中可能发生的重复。但这实际上是轮子的重新发明，因为UNION就是这样做的：它结合了两组和来消除重复。因此，您的查询也会在这方面得到简化，如图所示。