php chyba

$sql = "SELECT game_id, rival_id, result, h_a, UNIX_TIMESTAMP(datum) AS datum FROM game ORDER BY datum ASC";
$result = mysql_query($sql, $db) or die(mysql_error($db));
if(mysql_num_rows($result) > 0)
{
echo '<table>';
echo '<tr><td>Dátum</td><td>Domáci</td><td>Hostia</td><td>Výsledok</td></tr>';
while($row = mysql_fetch_array($result))  //na tomto riadku vypisuje chybu
{
extract($row);