This time, no flash required. Check out the WWW SQL Designer, this is a pretty damned slick ajax/javascript app that lets you visually build out your database tables, and you can then either export your tables as SQL to import into your own database server, or you can download the script and connect it to your own server and write the tables natively. Even if you have no interest in such a thing it’s worth checking out the demo just to see such a well designed ajax interface.