Just when you think there is nothing new under the sun, out pops a jackrabbit and teaches you a lesson in being shortsighted. Just the other day, I learned something new about database design. After spending a professional lifetime in the database design arena and being a participant in the industry's database debates, I thought there was nothing new left to see. But I was wrong.

In order to appreciate what's new in database design, a review of the past is in order. Figure 1 is representative of the different types of database design which have been popular over the years.

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