Re: Conceptual, Logical, and Physical views of data


"David Cressey" <david.cressey@xxxxxxxxxxxxx> wrote in message
news:EdWQe.3994$_84.75@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


> The logical view of data: the data as seen by the programmers. The
people
> who store and retrieve data from a database (or who write software that
does
> the same thing) view the data in terms of its appearance at the interface.
> Structural aspects of the data that are visible at the programming
> interface are part of the logical view. Structural aspects that are
> transparent at the interface are not part of the logical view. Structural
> alterations at the logical level may require program maintenance, but
> structural changes at the physical level will not.

Many programmers --> many "logical views of data"



.

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