MySQL: Update | funzt net

so sollte es gehn

$sql_update="UPDATE download SET download = '$dlz' WHERE download LIKE '$dl'";
$sql = "UPDATE `download` SET `download` = '$dlz' WHERE `id` = '$dl'";
$sql2="UPDATE download SET download = '$dlz' WHERE id = '$dl'";

$machen = mysql_query($sql_update);
$auchmachen = mysql_query($sql);
$immernochmachen = mysql_query($sql2);