title: Move node in nested set
body: <p>I'd need a MySQL query that moves a node and all its children within a nested set. I found <a href="http://archives.postgresql.org//pgsql-sql/2002-11/msg00358.php" rel="noreferrer">this</a> site, but that function just seems so illogical - there's no <code>universeid</code> or <code>treeid</code> in a nested set model, and the code itself is just longer than what feels required. The only extra column I've got in the table is <code>parent</code>.</p>
  
  <p>I couldn't just remove and add the node again since it will loose its ID.</p>