title: CAML GroupBy Sites
body: <p>I am creating a webpart which queries all lists of content type "A". The query will work on the lists located on the site the webpart is currently being loaded from and all sub sites. I have been able to accomplish this without a problem in a Content Query Webpart as well as CAML Query. However in a content Query Webpart I am able to group the results by the site (displayed as  in the dropdown list) the list corresponds to. As for doing this same thing using CAML, I am not able to groupby the site (I havent been able to find out what value to put inside the groupby tags). Any help would be greatly appreciated. Thanks in advance!</p>
  
  <p><strong>Ex.</strong></p>
  
  <pre><code>&lt;groupby&gt;
  What goes here?
  &lt;/groupby&gt;
  </code></pre>