title: Creating event-driven SQL scripts
body: <p>I am creating a database that stores GPS data.  As soon as the database updates with a data point , I want the server to check to see if that point is within a certain area and send a message or update another database (haven't decided what action it should take yet).  Is this event-driven operation possible in PL/SQL?  I am only familiar with passive querying and running scheduled scripts.</p>