Title: Timely ! Overall, this is the best available.
Product review: I have spent quite a bit of time working on databases that involve time issues. I've looked at much of the published material available, including Date's recent book, dozens of articles, conference proceedings, etc. Overall this is the best available.After I absorbed a lot of this book, I felt there could have been a more concise version of the concepts. Maybe someone will come out with a concise, well illustrated 100 pp. tutorial that is dramatically better, but it hasn't happened yet. Even though there are a lot of code samples, there is still a BIG leap to get to a production system. It is too bad that something like SQL/Temporal won't be coming out as a standard anytime soon. However, with conventional SQL you can still go a long way in developing databases just by using the Bitemporal design principles.Overall, if you work with time history, etc. in databases, you can't afford to not be studying this book.
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