Re: Interpretation of Relations
Date: Fri, 16 Feb 2007 00:11:15 GMT
Message-ID: <DE6Bh.1694$4c6.263_at_news-server.bigpond.net.au>
"Bob Badour" <bbadour_at_pei.sympatico.ca> wrote:
> One general caveat: Academic books often give rigorous definitions for
> terms that might differ from one text to another. For example, I often see
> contradictory definitions for 'candidate key'. Strangely, some texts use
> the term for teaching about proper superkeys and irreducibility while
> others use the term for teaching about the possibility of multiple logical
> identifiers.
A second general caveat: Academic books are often decades behind actual production solutions, as are the academics who flog them. It has of course always been a catch-up game in the great see-saw between theory and practice, but in the IT database environment theory currently lags practice by many years, especially in the realm of change management and the relationships between the RDBMS and its "related database software applications". Received on Fri Feb 16 2007 - 01:11:15 CET