Query an external database and display result on a dashboard
One answer
Is it possible for Oracle to treat the query as an RSS feed or return the content via a web page? If so, you might try the Feed widget or the External Content widget. OpenSocial gadgets can also be displayed on the dashboard (so it might be possible to find or build a widget to do this). As best I can tell, there isn't a built-in, generic database query widget.