ritornare valore con query UPDATE

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Se ho capito bene hai bisogno di questo:

<?php
$query_countview="select countview from tracklist where nome='mario' ";
$result_countview= mysql_query($query_countview);
while ($countview = mysql_fetch_row($result_countview))
$countview_num = implode ($countview);
$countview_piu_uno = ($countview_num+1);

UPDATE tracklist SET countview='$countview_piu_uno' WHERE nome='mario'