Re: SQL Statement Help Needed

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Тема Re: SQL Statement Help Needed
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Msg-id 20051206182957.32063.qmail@web33305.mail.mud.yahoo.com
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Ответ на Re: SQL Statement Help Needed  (<me@alternize.com>)
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--- me@alternize.com wrote:

> From: <operationsengineer1@yahoo.com>
> > the reason for doing this is that you eliminate
> > database dead space (people that don't have faxes
> > won't store a null in the db (i think it is null)
> and
> > the db won't have to manage the null values).
>
> correct me if i'm wrong, but i don't think having a
> completely normalized
> datastructure makes always sense. if one would need
> to query an employee and
> having all phone numbers & stuff in one single view,
> you'll end up having a
> huge amount of joins. this is bound to "cost"
> performance while the "win"
> (diskspace) is relatively small.
>
> - thomas

good point.  this is absolutely true...

the OP has enough information to make the best choice
for their situation.

sometimes normalization makes sense, other times it
may not.



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