Re: dbdebunk 'Quote of Week' comment
Date: Fri, 26 Aug 2005 13:30:16 +0200
Message-ID: <430efd5d$1_at_news.fhg.de>
x schrieb:
> This means that there must be a one to one mapping between the generated key
> and some key with a meaning for the end user. Therefore that meaningless
> primary key is a pointer. But one of the goals of the relational model is to
> eliminate pointers from the data model.
What is the difference between meaningless and meaningful pointer? I think the model itself does not know anything about the meaning of the pointers/keys it uses. In this sense the question about the meaning of pointers/keys relates to data modeling in general rather than to the RM. In other words, the question is if we should choose meaningful or meaningless identifiers for our entites.
> Other goal is to give the end user direct access to data.
-- http://conceptoriented.comReceived on Fri Aug 26 2005 - 13:30:16 CEST