php mysql look for re sult that = y

the code below is work but i want to change not limit 1   in case  presell.stockcut is y such as they have 10 row but they have 1 row that
presell.stockcut = y

then go to    


 if($checkstockcut == "y") {
      echo "<meta http-equiv=\"refresh\" content=\"0;url=presalefromS1.php/\" />\n";
      }

  $query20 = "SELECT presell.stockcut  FROM presell WHERE refid = '$invoicenocheck' limit 1 ";
      $query20result  = mysql_query ($query20) or die( mysql_error());
      $row_slelectPresell = mysql_fetch_assoc($query20result );
      $checkstockcut = $row_slelectPresell['stockcut'];
      echo $checkstockcut;
          if($checkstockcut == "y") {
      echo "<meta http-equiv=\"refresh\" content=\"0;url=presalefromS1.php/\" />\n";
      }
      else {