Despite what the reactionaries assert, the world is not flat nor is it hierarchical. The world is relational.
You have enemies? Good. That means you've stood up for something, sometime in your life. -- Victor Hugo/1845
... but Flash-based storage has such a different performance profile from rotating media, that I suspect that it will end up having a large impact on filesystem design. Right now, most filesystems tend to be designed with the latencies of rotating media in mind. -- Linus Torvalds/2007
I believe quite strongly that, if you think about the issue at the appropriate level of abstraction, you're inexorably led to the position that databases must be relational. -- Chris Date/2009
RSQLite is a low-level interface to SQLite; sqldf is a high-level interface that lets you pretend than you can execute SQL on R data frames. -- Hadley Wickham/2014
When you're dead, you're dead. Until then, there's ice cream. -- Patrick Jane/2011
Therefore: In a time of SSD multi-core/processor machines, there is no reason not to build from BCNF data. Time to do what Dr. Codd demonstrated. Technology has finally caught up with the maths.
I know a little something about SQL, DB2 (preferably LUW, z/OS if the money's right), Oracle, SQL Server, Postgres, and database design in general. Mentoring/teaching/consulting on a short term basis, too. And a bit of stat analysis if it's R. gnuoytr at rcn dot com.