Status Updates From SQL for Dummies

# Temporaldata, primary key issue

''After you eliminate most redundancy from a database design, you may find that performance is now unacceptable. Operators often purposefully use a little redundancy to speed up processing.'' joining table faster at the expense of slowing down and complicating updating.

still no dragons

Not really a good guide to learn SQL more of a thing to read to refresh what you already know

I always assumed c3po a girl...