Re: WHAT vs HOW vs WHERE

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"Laconic2" <laconic2_at_comcast.net> wrote in message news:gP-dnV2oqsnmeCTdRVn-sw_at_comcast.com...
> Just to save time, I'm NOT asserting that anyone who does understand the
> difference between pointers and foreign keys WILL understand the rest of
the
> RDM.
>
> There are other concepts to learn.
>
> All I am asserting is that anyone who does NOT understand the difference
> between foreign keys and pointers as far as pinning referenced data is
> concerned has an obstacle (an insurmountable obstacle IMO) to
understanding
> the RDM from either a theoretical or a pragmatic point of view.

An "address" (physical, logical, whatever) is used to *locate* something. A primary, foreign, candidate key is used to *identify* something. The problem is sometime (all the time ?) we use attributes that *locate* something for *identifying*.

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