Show Only Recently Updated Links

I’m wanting to create a function that shows only recently updated links in a links list. I’m rooting through the code and it looks like the code that decides this would be in links.php in the get_links function. I’m wondering how I should modify the SQL query to grab only links with a recently updated list within the prescribed interval.

Here’s the SQL query code from get_links

$sql = “SELECT link_url, link_name, link_image, link_target,
link_description, link_rating, link_rel $length $recently_updated_test $get_updated
FROM $wpdb->links
WHERE link_visible = ‘Y’ ” .
$category_query;
$sql .= ‘ ORDER BY ‘ . $orderby;
$sql .= $direction;
/* The next 2 lines implement LIMIT TO processing */
if ($limit != -1)
$sql .= ” LIMIT $limit”;

What would I add to the WHERE spec that would limit things to the interval up updated-ness?

If that is too involved – how could I root out the non-recently updated links once the list is made? To somehow run a command on $results to remove all links in the array that don’t have recently_updated set to true?

Thanks!