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Thank You !!!
Hip Hip Hurray for Michael !!!
Thanks!!!
Larry Bradshaw
At 08:18 PM 8/25/2003 +0100, Michael Kay wrote:
> > Ah, yes. The main problems with the hierarchical model are
> > that it encourages data redundancy which leads to problems
> > during updates and deletions.
>
>Wrong!
>
>3rd normal form was about showing that you could move to a relational
>representation of data without introducing redundancy. The problems with
>hierarchical and network database systems were quite different: the lack
>of declarative data manipulation languages with good closure properties,
>the close coupling of the data model and its implementation in physical
>storage, the consequent high cost of data loading and reorganization.
>
>Another urban myth...
>
>Michael Kay
>
>
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