$sql = 'SELECT * FROM ' . SUJETS_TABLE . ' as suj, ' . MESSAGES_TABLE . ' as mes, ' . MEMBRES_TABLE . ' as mem 
      WHERE suj.forum_id = \'' . $forum_news . '\' 
      AND mes.message_id = suj.premier_message_id
      AND mem.membre_id = suj.membre_id
      ORDER BY suj.sujet_id DESC
      ' . ($nb_news == NULL ?  'LIMIT 0,' . $forum_nbnews : '');