title: DELETE ADJACENT DUPLICATES delete order?
body: <p>If there are entries with the same key.</p>
  
  <blockquote>
    <p>sort itab by key.
    delete adjacent duplicates from itab comparing key.</p>
  </blockquote>
  
  <p>Does anyone know which one will be deleted if delete adjacent duplicates..comparing key?
  The first one or second one?</p>