SharePoint makes it easy to create lists of events, tasks or issues, that can be used to track (or document) items that live in a database or an ERP.

When creating reports out of those SharePoint lists, it can be convenient to display additional information coming from your database.

Enesys RS Data Extension already lets you do that with SQL Server databases:

In version 3.6, we have extended this feature by adding support for Oracle databases as shown in the following screen shots.

Selecting database type:

Connection properties:

Querying data from an Oracle database:

Of course, this will not be one database or the other. Within the same query, you will be able to join data from SharePoint lists, SQL Server and Oracle all together.