This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
A good software engineer should know about databases and sql as well. But DB administration, imho, goes a little beyond what a good s/w engineer is expected to know. I am not sure what are the requirements for a DBA certification, but if it involves a lot of administration kind of topics, JPA is what you should go with.