Leper's Colony - Burn all mods edition

<?php
$db = mysqli_connect("localhost","USERNAME","PASSWORD","sa");
$sql = "SELECT * FROM measure";

switch ($_GET['sort_by']) {
    case "mods":
        $sql .= " ORDER BY mods";
        break;
    case "total":
        $sql .= " ORDER BY total";
        break;
    case "auto":
        $sql .= " ORDER BY autobans";
        break;
    case "bans":
        $sql .= " ORDER BY bans";
        break;
    case "perma":
        $sql .= " ORDER BY permabans";
        break;
    case "probate":
        $sql .= " ORDER BY probations";
        break;
    default:
        break;
}

if ($_GET['sort_by'] != "")
{
    if ($_GET['desc'] == 1)
    {
        $sql .= " DESC";
    }
}

$result = mysqli_query($db,$sql);

?>
<html>
<head>
<title>Leper's Colony &bull; Burn all mods edition</title>
<style type="text/css">
.results
{
        margin-left: 4%;
}
</style>
</head>
<body>
<p class="results"><strong><?php echo mysqli_num_rows($result); ?></strong> horrible mods have made requests. Dammit!</p>
<table>
        <tr>
                <th><a href="?sort_by=mods">HORRIBLE MOD</a></th>
                <th><a href="?sort_by=total">TOTAL</a></th>
                <th><a href="?sort_by=auto">AUTOBANS</a></th>
                <th><a href="?sort_by=bans">BANS</a></th>
                <th><a href="?sort_by=perma">PERMABANS</a></th>
                <th><a href="?sort_by=probate">PROBATIONS</a></th>
        </tr>
        <tr>
                <th><a href="?sort_by=mods&desc=1">[DESCENDING]</a></th>
                <th><a href="?sort_by=total&desc=1">[DESCENDING]</a></th>
                <th><a href="?sort_by=auto&desc=1">[DESCENDING]</a></th>
                <th><a href="?sort_by=bans&desc=1">[DESCENDING]</a></th>
                <th><a href="?sort_by=perma&desc=1">[DESCENDING]</a></th>
                <th><a href="?sort_by=probate&desc=1">[DESCENDING]</a></th>
        </tr>
<?php
// this creates a row of data for each row that exists (there's about ~302 as of Jan 24, 2014)
        while($row = mysqli_fetch_assoc($result))
        {
                extract($row);
                ?>
                <tr>
                        <td><?php echo $row['mods']; ?></td>
                        <td><?php echo $row['total']; ?></td>
                        <td><?php echo $row['autobans']; ?></td>
                        <td><?php echo $row['bans']; ?></td>
                        <td><?php echo $row['permabans']; ?></td>
                        <td><?php echo $row['probations']; ?></td>
                </tr>
                <?php
        }
?>
</table>
</body>
</html>