Select finder flere poster, men har et bestemt felt samme værdi

$db_owner = "Jens Jensen";

$sql_query = ("
  SELECT DISTINCT `STELNR`
  FROM `BIL`
  WHERE `OWNER` = '".$db_owner."';
");

$query_soeg = mysql_query($sql_query) or die (mysql_error());

if (mysql_num_rows($query_soeg) == 1) {
    $sql_query_details = ("
      SELECT *
      FROM `BIL`
      WHERE `OWNER` = '".$db_owner."'
      ORDER BY `UDSTYR` ASC;
    ");

    $query_details = mysql_query($sql_query_details) or die (mysql_error());

    while ($row_bil = mysql_fetch_assoc($query_details)) {
        echo $row_bil['UDSTYR']."<br>";
    }
} else {
    // Vis liste over biler.
}