Update XML node value in SQL Server

Question

I need to update the GroupID field to a 0. I have figured out how to retrieve the value, I am now running into problems updating it.

Any help would ge great!

<ProblemProfile>
  <GroupID>-1</GroupID>
  <LayoutID>1</LayoutID>
  <MyQueries>false</MyQueries>
</ProblemProfile>

Declare @Result xml
set @Result = convert(xml,(select ProfileXML from profiles where id = 23))

SELECT x.value('.', 'int') ID
FROM @Result.nodes('/ProblemProfile/GroupID') as R(x)

Update

What I need to do now is update every single row's GroupID that has the value of 'foo'

declare @foo int
set @foo = -1

UPDATE  profiles
SET  ProfileXML.modify('replace value of (/ProblemProfile/GroupID/text())[1] with "0"')
WHERE  ProfileXML.value('(/ProblemProfile/GroupID)[1]', 'int') = @foo

This is only updating the first row that meets this criteria. How would I update every row?

Update 2 That statement works. Turns out the database structure for the first node can be different. A simple //GroupID...etc updated every row. It is always the stupid little things that trip us up haha.

Answer 1

You can do something like this:

UPDATE 
   dbo.profiles
SET 
   ProfileXML.modify('replace value of (/ProblemProfile/GroupID)[1] with "0"')
WHERE
   id = 23

Check out this article on SQL Server 2005 XQuery and XML-DML for more details on what you can do with the .modify keyword (insert, delete, replace etc.).

Marc

PS: In order to get the value, it would be a lot easier to do just this:

SELECT ProfileXML.value('(/ProblemProfile/GroupID)[1]', 'int') as ID
FROM dbo.profiles
WHERE id = 23

(unless of course you need the XML as a SQL variable for something else later on)