Mwp.Reid at Queens-Belfast.AC.UK
Mwp.Reid at Queens-Belfast.AC.UK
Mon Mar 10 14:19:16 CST 2003
In the design you include the FKs. Matter of course. Least I do. Particulary if your using a case tool to do the ERs etc. Martin Quoting Susan Harkins <harkins at iglou.com>: > I agree with your Charles. It's the smart developer that can jump right > in > and create those tables with little or no thought to design before > starting. > I wouldn't attempt it. > > I'm just curious about the foreign keys though at this point -- more so > than > the actual design process. > > For whatever reason, I seem to remove fields until all my tables are > set. > Then, I go back and relate the tables by inserting foreign keys, and > I'm > just curious what others do. > > Susan H. > > > > Susan, > > > > Whether you do it on paper or on the PC, it usually is an iterative > > process, at least in my experience. By that I mean as you go along > you > > will discover that one or more of the tables you have already > designed > > needs to be split since some of the data fields apply only to the > > subject of the table while other data fields does not. And you will > > notice that some data fields split over several tables should be > > combined into one table. > > > > It would be a very simple application, or a very astute individual, > > where all the relationships are obvious from the beginning. > > > > Charles Wortz > > Software Development Division > > Texas Education Agency > > 1701 N. Congress Ave > > Austin, TX 78701-1494 > > 512-463-9493 > > CWortz at tea.state.tx.us > > > > > > > > -----Original Message----- > > From: Susan Harkins [mailto:harkins at iglou.com] > > Sent: Monday 2003 Mar 10 12:50 > > To: accessd at databaseadvisors.com > > Subject: Re: [AccessD] normalization question > > > > Yes, I agree... > > > > but in the process of making your paper lists -- when? > > > > > > ----- Original Message ----- > > From: <Mwp.Reid at Queens-Belfast.AC.UK> > > To: <accessd at databaseadvisors.com> > > Sent: Monday, March 10, 2003 1:34 PM > > Subject: RE: [AccessD] normalization question > > > > > > > > > > you do it before turning the PC on when your designing the > structures. > > > > > The theory is that the data is normalised before you actually > create > > > the > > tables > > > physically. > > > > > > Martin > > > > > > (<: > > > > > > > > > > > > Quoting Charlotte Foust <cfoust at infostatsystems.com>: > > > > > > > I tend to do it at the time so I don't forget. Of course, as we > get > > > > > > older our memory ... Uh, what was I saying? <vbg> > > > > > > > > Charlotte Foust > > > > > > > > -----Original Message----- > > > > From: Susan Harkins [mailto:harkins at iglou.com] > > > > Sent: Sunday, March 09, 2003 3:36 PM > > > > To: AccessD at databaseadvisors.com > > > > Subject: [AccessD] normalization question > > > > > > > > > > > > When you remove a field to another table (for whatever reason), > do > > > > you immediately create the foreign key in the original table, or > do > > > > you wait until you've completely normalized each table and then > > > > return to the tables and insert all the foreign keys then? > > > > > > > > I tend to do it later because the nature of a single field can > > > > change. > > > > > > > > Does anyone know if the relational model requires a particular > > > > routine? > > > > > > > > Just curious. > > > > > > > > Susan H. > > _______________________________________________ > > AccessD mailing list > > AccessD at databaseadvisors.com > > http://databaseadvisors.com/mailman/listinfo/accessd > > Website: http://www.databaseadvisors.com > > > > > > _______________________________________________ > AccessD mailing list > AccessD at databaseadvisors.com > http://databaseadvisors.com/mailman/listinfo/accessd > Website: http://www.databaseadvisors.com >