Extracting Attribute Values from XML Using XQuery

I am serializing a .NET object as XML and passing it as a parameter to a stored procedure. I am new to XQuery and have tried other places to find the answer to this question but have so far been unsuccessful.

How can I get the value of an attribute out of an XML document as a standard SQL Server data type? For instance, if my XML document were:

<RootNode>
<Object ID = "1234">
<AnElement>Some Other Value</AnElement>
</Object>
</RootNode>

What would be the correct XQuery to get the value of the ID attribute in the Object element?

Thanks in advance.

Kevin J Lambert

create table #xml_temp (

xml_col xml

)

insert into #xml_temp values('<RootNode>

<Object ID = "1234">

<AnElement>Some Other Value</AnElement>

</Object>

</RootNode>')

--With query() function

select xml_col.query('data(/RootNode/Object/@.ID)') from #xml_temp

--With value() function

select xml_col.value('data(/RootNode/Object/@.ID)[1]','int') from #xml_temp