JDBC drivers are present for many commonly used databases. You can see this list by navigating to Administration > Admin Console > Data Sources > 'Your Data Source' > And clicking the 'Database:' drop down. You should see the following:
The drivers that are greyed out are supported, but Yellowfin does not natively come with JDBC drivers installed for them. These databases need to have JDBC drivers manually installed. The following forum post outlines how to do this:
How to add a new JDBC drivers for use in Yellowfin
Hopefully this answers your question. If you need any further clarification, please feel free to let me know.
Have a great day!
The Yellowfin Support Team
Community Forum: www.yellowfinbi.com/YFForum.i4