我的 UPDATE 语句中的逻辑有什么问题?
我希望得到有关 UPDATE 语句的帮助。
我想使用 tblCustomer
中的内容更新 tblOrderHead
,其中 intDocumentNo
对应于参数 @intDocumentNo
。但是,当我运行 my 语句时,订单表仅使用客户表第一行的内容进行更新。
我的逻辑有什么问题?
我使用微软 SQL Server。
谢谢,
斯特凡
UPDATE dbo.tblOrderHead
SET dbo.tblOrderHead.intCustomerNo = @intCustomerNo ,
dbo.tblOrderHead.intPaymentCode = dbo.tblCustomer.intPaymentCode,
dbo.tblOrderHead.txtDeliveryCode = dbo.tblCustomer.txtDeliveryCode,
dbo.tblOrderHead.txtRegionCode = dbo.tblCustomer.txtRegionCode,
dbo.tblOrderHead.txtCurrencyCode = dbo.tblCustomer.txtCurrencyCode,
dbo.tblOrderHead.txtLanguageCode = dbo.tblCustomer.txtLanguageCode
FROM dbo.tblOrderHead
INNER JOIN dbo.tblCustomer ON dbo.tblOrderHead.intOrderNo = @intDocumentNo
解决方案
如果有人像我一样愚蠢,也有同样的事情,这就是你解决它的方法:
UPDATE dbo.tblOrderHead
SET dbo.tblOrderHead.intCustomerNo = @intCustomerNo ,
dbo.tblOrderHead.intPaymentCode = dbo.tblCustomer.intPaymentCode,
dbo.tblOrderHead.txtDeliveryCode = dbo.tblCustomer.txtDeliveryCode,
dbo.tblOrderHead.txtRegionCode = dbo.tblCustomer.txtRegionCode,
dbo.tblOrderHead.txtCurrencyCode = dbo.tblCustomer.txtCurrencyCode,
dbo.tblOrderHead.txtLanguageCode = dbo.tblCustomer.txtLanguageCode
FROM dbo.tblOrderHead
INNER JOIN dbo.tblCustomer ON dbo.tblOrderHead.intCustomerNo = dbo.tblCustomer.intCustomerNo
AND dbo.tblOrderHead.intOrderNo = @intDocumentNo
I would appreciate some help with an UPDATE statement.
I want to update tblOrderHead
with the content from tblCustomer
where the intDocumentNo
corresponds to the parameter @intDocumentNo
. But when I run the my statement, the order table is only updated with the content from the first row of the customer table.
What is the problem with my logic?
I use Microsoft SQL Server.
Thanks,
Stefan
UPDATE dbo.tblOrderHead
SET dbo.tblOrderHead.intCustomerNo = @intCustomerNo ,
dbo.tblOrderHead.intPaymentCode = dbo.tblCustomer.intPaymentCode,
dbo.tblOrderHead.txtDeliveryCode = dbo.tblCustomer.txtDeliveryCode,
dbo.tblOrderHead.txtRegionCode = dbo.tblCustomer.txtRegionCode,
dbo.tblOrderHead.txtCurrencyCode = dbo.tblCustomer.txtCurrencyCode,
dbo.tblOrderHead.txtLanguageCode = dbo.tblCustomer.txtLanguageCode
FROM dbo.tblOrderHead
INNER JOIN dbo.tblCustomer ON dbo.tblOrderHead.intOrderNo = @intDocumentNo
Solution
If anyone as stupid as me out there thing the same thing, this is how you solve it:
UPDATE dbo.tblOrderHead
SET dbo.tblOrderHead.intCustomerNo = @intCustomerNo ,
dbo.tblOrderHead.intPaymentCode = dbo.tblCustomer.intPaymentCode,
dbo.tblOrderHead.txtDeliveryCode = dbo.tblCustomer.txtDeliveryCode,
dbo.tblOrderHead.txtRegionCode = dbo.tblCustomer.txtRegionCode,
dbo.tblOrderHead.txtCurrencyCode = dbo.tblCustomer.txtCurrencyCode,
dbo.tblOrderHead.txtLanguageCode = dbo.tblCustomer.txtLanguageCode
FROM dbo.tblOrderHead
INNER JOIN dbo.tblCustomer ON dbo.tblOrderHead.intCustomerNo = dbo.tblCustomer.intCustomerNo
AND dbo.tblOrderHead.intOrderNo = @intDocumentNo
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问题是,您没有指定需要连接 2 个表
tblOrderHead
、tblCustomer
的条件!你需要类似的东西
Problem is that, you are not specifying the condition on which the 2 tables
tblOrderHead
,tblCustomer
need to be joined!you need something like