Re: Has anyone tried Date/Darwen/Lorentzos's model for temporal data?

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От George Essig
Тема Re: Has anyone tried Date/Darwen/Lorentzos's model for temporal data?
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Msg-id 20041016010733.28155.qmail@web53707.mail.yahoo.com
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Ответ на Re: Has anyone tried Date/Darwen/Lorentzos's model for temporal data?  ("Eric D. Nielsen" <nielsene@MIT.EDU>)
Ответы Re: Has anyone tried Date/Darwen/Lorentzos's model for temporal data?  (Michael Glaesemann <grzm@myrealbox.com>)
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--- "Eric D. Nielsen" <nielsene@MIT.EDU> wrote:

> Thanks for the Snodgrass reference, it is rather similar and pre-dates
> the book I was looking at.  (Same notion of valid/transaction times,
> but Date's non-SQL approach)  From a quick skim it doesn't address the
> distinction Date et al draw between historic and current temporal data;
> however it looks very useful for mapping their concepts to SQL.
>
> Eric

You might want to look at Section 7.5 Temporal Partitioning.  One table is used to store current
data and another table is used to store historic data.

George

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