[英]Updating XML attribute in SQL Server XML column
I am trying to update a node of in my XML which is stored in a SQL Server XML column, the line below works if my XML is in a XML element but now I somehow need to change it to XML attributes, apparently the line becomes invalid after the change. 我正在尝试更新存储在SQL Server XML列中的XML中的一个节点,如果我的XML在XML元素中,则下面的行有效,但是现在我需要以某种方式将其更改为XML属性,显然该行变得无效更改后。
Works for XMLElement: 适用于XMLElement:
UPDATE [Customers]
SET voucherXML.modify('replace value of (/ArrayOfCampaignVoucher/CampaignVoucher/Qty/text())[1] with "50"')
WHERE voucherXML.value('(/ArrayOfCampaignVoucher/CampaignVoucher/VouCode)[1]', 'nvarchar(50)') = @VoucherCode
I tried changing the statement like this but no luck, no errors but QTY
values doesn't get change to the value of @NewQuantity
: 我试图像这样更改语句,但是没有运气,没有错误,但是
QTY
值未更改@NewQuantity
的值:
UPDATE [Customers]
SET voucherXML='<ArrayOfCampaignVoucher xmlns:xsd="http://www.w3.org/2001/XMLSchema" Qty="' + CAST(@NewQuantity AS NVARCHAR(16)) + '" />'
WHERE voucherXML.value('(/CampaignVoucher/VouCode)[1]', 'nvarchar(50)') = @VoucherCode
This is how my XML looks in the SQL Server XML column: 这是我的XML在SQL Server XML列中的样子:
<ArrayOfCampaignVoucher xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<CampaignVoucher VouCode="Vouc001" Qty="16" />
<CampaignVoucher VouCode="Vouc002" Qty="18" />
<CampaignVoucher xsi:nil="true" />
</ArrayOfCampaignVoucher>
You should use the XQuery functions - not string together your XML like this.... 您应该使用XQuery函数-不要像这样将XML串在一起。
Try this instead: 试试这个:
DECLARE @newquantity INT = 55
UPDATE dbo.Customers
SET voucherXML.modify('replace value of (/ArrayOfCampaignVoucher/CampaignVoucher[@VouCode="Vouc002"]/@Qty)[1] with sql:variable("@NewQuantity") ')
This works for me - the Qty
attribute of the node with VouCode="Vouc002"
gets updated to the value I defined before in a SQL variable 这对我
VouCode="Vouc002"
-具有VouCode="Vouc002"
的节点的Qty
属性更新为我之前在SQL变量中定义的值
Update: to insert a new <CampaignVoucher>
entry, use XQuery something like this: 更新:要插入新的
<CampaignVoucher>
条目,请使用XQuery如下所示:
UPDATE dbo.Customers
SET voucherXML.modify('insert <CampaignVoucher VouCode="Vouc003" Qty="42" />
as last into (/ArrayOfCampaignVoucher)[1]')
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