Newbie - using EJB and databases

[kevin1]

Hello all,
        I am still new to the whole EJB thing, but I have a grasp on it.  However,
the one thing I am foggy on is how to use a database.  I know that I set up the
db connection in the data-sources.xml file, but what is the syntax to use that
in an application?  Where could I find an example of that?