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Question about data DeNormalization
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De
26/04/2002 18:10:41
Cindy Winegarden
Duke University Medical Center
Durham, Caroline du Nord, États-Unis
 
 
À
22/04/2002 23:18:37
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00647962
Message ID:
00649832
Vues:
21
Bill,

Can you say more about why you need to store totals rather than re-calculating them as necessary? There is no good way to be sure they are always correct if the Details table continues to change.

That being said, if you have a denormalized database used for reporting I can see how you might want to select the totals and store them. But then you would be taking a snapshot of your data and using the batch process you described to update it each night or weekly or something like that.


>When I need to store totals in a different table (TOTALS.DBF) than the detail (DETAILS.DBF
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