WebSphere Application Server and the Application Client for WebSphere Application Server do not provide client database drivers to be used directly from a J2EE application client. If your application client accesses a database directly, provide the database drivers on the client machine.
You can contact your database vendor to acquire client database driver
code and licenses. In addition, data sources configured on the server and
looked up on the client do not participate in global transactions. Instead
of accessing the database directly, IBM recommends that your client application
use an enterprise bean. Accessing a database through an enterprise bean eliminates
the need to have database drivers on the client machine because the database
access is handled by the enterprise bean running on WebSphere Application
Server. For a current list of providers that are supported on WebSphere Application
Server visit the WebSphere Application Server prerequisite Web site. (See
the following link.)