Using jQuery for creating database outgoing links custom events. You obviously need to replace the 'a.db_name' with whatever class you wrap your database links in. If you are using this in Drupal, as I am, use instructions here to make your life easier when creating jQuery objects: https://drupal.org/node/171213#comment-4686396.

gistfile1.js

<!--Database custom events-->
<script type="text/javascript">
$(document).ready(function(){
    $('a.db_name').each(function(){
    var db_name = $(this).text();
    $(this).click(function(){
        _gaq.push(["_trackEvent", "linkOut", "database", db_name]); // create a custom event
        });
    });
});
</script>