how does dimensional modelling used by datawarehousing fit into relational theory?
>
> From: Daniel Hanks <hanksdc_at_about-inc.com>
> Date: 2003/11/19 Wed PM 04:35:03 EST
> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> Subject: RE: Any articles/books that take relational theory and make it
>
> Agreed. And I think you'll admit it's better to be familiar with and aware of the theory, even if current db products don't live up to the model 100%, so you know to bring up the kinds of issues you mention in the first place. In that sense, I think the knowledge to be gained from Date, Darwen, Pascal, etc., can be very practical.
>
> -- Dan
>
> On Wed, 19 Nov 2003, Niall Litchfield wrote:
>
> > I obviously can't speak for the list, but I find Fabian Pascal to be
> > very interesting, but quite academic. What I *think* that I mean by this
> > is that a lot of what he says seems to make theoretical sense, but I'm
> > unsure how applicable it is to practice. IOW the general feel that I get
> > from Fabian (and indeed Date) is that if something doesn't meet
> > relational theory then it is flawed. This may well be a good default
> > position to have, but I'm unprepared to say to folk who pay my wages
> > 'sorry your data model isn't in 3NF' or 'you shall not use a
> > materialized view'. I *will* quite happily say 'so how will you ensure
> > data integrity?' 'what happens if another program uses the same data' or
> > 'why did you use computed summaries?'
> >
> > Niall
> > > -----Original Message-----
> > > From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On
> > > Behalf Of Daniel Hanks
> > > Sent: 19 November 2003 16:25
> > > To: Multiple recipients of list ORACLE-L
> > > Subject: Re: Any articles/books that take relational theory
> > > and make it
> > >
> > >
> > > On Wed, 19 Nov 2003 ryan_oracle_at_cox.net wrote:
> > >
> > > > I swapped emails with a member of the list and Im having trouble
> > > > seeing how you can take 3NF, BCNF, etc... and turn that into DBA
> > > > speak. One of the guys told me that BCNF essentially means
> > > you have a
> > > > key that you can put a unique constraint on. Well that
> > > makes this much
> > > > easier to understand.
> > > >
> > >
> > > Hrm, I thought a key, by definition, implied a unique constraint...
> > >
> > > > All my theory books just discuss theory. Anyone know some
> > > that split
> > > > the difference. IE, not Codd, not CJ Date, Not the academic
> > > textbooks.
> > > >
> > >
> > > I'm not sure what the opinion on Fabian Pascal is here on the
> > > list, but I found his "Practical issues in Database
> > > Management" to be very good. It's subtitled "A reference for
> > > the thinking practitioner". It's not a textbook, but it does
> > > make you use your brain a bit. It might be what you're
> > > looking for. It has helped to clarify the relational model
> > > for me, but might put some people off as it's critical
> > > (without naming specific products) of most current
> > > implementations of 'relational' databases.
> > >
> > > > Thanks.
> > > >
> > > >
> > >
> > > -- Dan
> > > ==============================================================
> > > ==========
> > > Daniel Hanks - Systems/Database Administrator
> > > About Inc., Web Services Division
> > > ==============================================================
> > > ==========
> > > --
> > > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > > --
> > > Author: Daniel Hanks
> > > INET: hanksdc_at_about-inc.com
> > >
> > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> > > San Diego, California -- Mailing list and web hosting services
> > > ---------------------------------------------------------------------
> > > To REMOVE yourself from this mailing list, send an E-Mail message
> > > to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru')
> > > and in the message BODY, include a line containing: UNSUB
> > > ORACLE-L (or the name of mailing list you want to be removed
> > > from). You may also send the HELP command for other
> > > information (like subscribing).
> > >
> >
> >
>
> --
> ========================================================================
> Daniel Hanks - Systems/Database Administrator
> About Inc., Web Services Division
> ========================================================================
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Daniel Hanks
> INET: hanksdc_at_about-inc.com
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
> ---------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> the message BODY, include a line containing: UNSUB ORACLE-L
> (or the name of mailing list you want to be removed from). You may
> also send the HELP command for other information (like subscribing).
>
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: <ryan_oracle_at_cox.net
INET: ryan_oracle_at_cox.net
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
San Diego, California -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
Received on Thu Nov 20 2003 - 06:43:58 CST
