Question

First off i’ll start by noting that its not my choice to use nvp’s within XML and its in the process of being modified. That being said, I have a table that contains an XML column that has the following xml:

<root>
  <results>
    <result name='First Result'>
      <property name='Property1' value='Value1' />
      <property name='Property2' value='Value2' />
    </result>
  </results>
</root>

I have the following query that gets me the result name:

SELECT
  T.N.value('@name', 'nvarchar(256)') AS resultName
FROM
  results CROSS APPLY xmlField.nodes('/root/results/result') AS T(N)

But I’m not positive how I could get the property to display. I tried the following:

SELECT
  T.N.value('@name', 'nvarchar(256)') AS resultName,
  T.N.value('/property[@name="Property1"]/@value', 'nvarchar(256)') AS Property
FROM
  results CROSS APPLY xmlField.nodes('/root/results/result') AS T(N)

But I got the following error:

XQuery [results .xmlField.value()]: ‘value()’ requires a singleton (or empty sequence), found operand of type ‘xdt:untypedAtomic *’

I know I’m along the right path, but I’m not quite positive what exactly I should be doing. Would anyone be able to point me in the right direction?

Answer 1

Is this what you’re after?

SELECT 
  T.N.value('../@name','varchar(255)') as resultName,
  T.N.value('@name', 'nvarchar(256)') AS Propertyname ,
  T.N.value('@value', 'nvarchar(256)') as Value      
FROM 
    results
        cross apply
  xmlfield.nodes('/root/results/result/property') AS T(N) 
where
     T.N.value('@name', 'nvarchar(256)') ='property1'   

OR

SELECT 
  T.N.value('@name', 'nvarchar(256)') AS resultName,
  T.N.value('(./property[@name="Property1"]/@value)[1]', 'nvarchar(256)') AS Property 
FROM 
  results CROSS APPLY xmlField.nodes('/root/results/result') AS T(N)