title: Core Data - GROUP BY
body: <p>I am trying to group results returned by Core Data. I read that you need to use "SortDescriptors" with a selector but I cant seem to get it to work?</p>
  
  <p>I am trying to return group'ed "unique" name values?</p>
  
  <p><a href="http://developer.apple.com/library/ios/#documentation/cocoa/Conceptual/SortDescriptors/Concepts/Creating.html" rel="nofollow">http://developer.apple.com/library/ios/#documentation/cocoa/Conceptual/SortDescriptors/Concepts/Creating.html</a></p>