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By Thierry.Lefort
via b-eye-network.com
Published: Jul 19 2008 / 09:51

When I teach, I frequently discuss temporal based data sets - after all, that's a big piece of what data warehousing and BI is about - Data Over Time. But when examining the database engines ability to "retrieve" specific data sets as a snapshot in time, it seems there is a problem. There appears to be no "consistent" manner in which to retrieve these layers for use by the business.
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