Update XML stored in a XML column in SQL Server

问题

I have a sample table in SQL Server 2012. I am running some queries against but the .modify() XQuery method is executing but not updating.

Here is the table

For this just trying to update settings to 'NewTest'

This will execute but nothing is updating! Thanks for any help!

回答1:

Since there is a XML namespace (xmlns:dev="http://www.w3.org/2001/XMLSchema") in your XML document, you must inlcude that in your UPDATE statement!

Try this:

;WITH XMLNAMESPACES(DEFAULT 'http://www.w3.org/2001/XMLSchema')
UPDATE XmlTable
SET XmlDocument.modify('replace value of (/Doc/@Settings)[1] with "NewTest"')
WHERE XmlId = 1

回答2:

You should declare a namespace in your update syntax .Try the below syntax

Declare @Sample table
(xmlCol xml)

Insert into @Sample
values
('<dev:Doc xmlns:dev="http://www.w3.org/2001/XMLSchema" 
                       SchemaVersion="0.1" Settings="Testing" Ttile="Ordering">
        <Person id="1">
            <FirstName>Name</FirstName>
        </Person>
      </dev:Doc>')
 Select * from @Sample
 Update @Sample
 SET xmlCol.modify(
                  'declare namespace ns="http://www.w3.org/2001/XMLSchema";
                   replace value of (/ns:Doc/@Settings)[1]
                   with "NewTest"')

 Select * from @Sample

来源：https://stackoverflow.com/questions/16514067/update-xml-stored-in-a-xml-column-in-sql-server