[AccessD] 2 quick questions

Drew Wutka DWUTKA at Marlow.com
Wed Jun 1 20:52:25 CDT 2011


But the argument about 'intelligent keys' are about human ways of
thinking.

Drew

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Jim Dettman
Sent: Wednesday, June 01, 2011 6:29 PM
To: 'Access Developers discussion and problem solving'
Subject: Re: [AccessD] 2 quick questions

Drew,

<<His laws really only apply to how a HUMAN sees the data, you
would need a complete paradigm shift in computer technology, in order to
make computers operate the same way humans do.>>

  Sorry, but that's not correct.  Relational theory has nothing to do
with
how humans see data nor computers. It's irrespective of each.

  It's based on mathematics and set relations.  Nothing more and nothing
less.

Jim.

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Drew Wutka
Sent: Wednesday, June 01, 2011 12:47 PM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] 2 quick questions

I AGREE that intelligent keys have a place in the world.... the human
world.

It is our job, as developers, to create a computer system that works
well on the computer, and INTERFACES well with its users (humans).

Labels with an intelligent key are fine... they are being read by
humans.  Entry screens allowing a human to put in an intelligent key are
fine.  The data should NOT be related/stored based on the intelligent
key.

Let's go with Batch, Lot, Item again.  In a XXXX-XXXX-XXXX format.
Someone wants to view all the Items in Lot 3425.  You are now doing a
query for %-3425-%... how inefficient is that?  Each Batch should have
its own primary key which is unique to each batch, so should each lot,
and each item, and internally, the one to many relationships are
recorded using their primary keys.  

Even if you created a database system that met the 12 rules (rather 13
rules...LOL) that Codd presented for his relational model, internally,
you would be breaking the laws to deal with the 1's and 0's of a
computer.  His laws really only apply to how a HUMAN sees the data, you
would need a complete paradigm shift in computer technology, in order to
make computers operate the same way humans do.

Drew

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Arthur Fuller
Sent: Wednesday, June 01, 2011 10:47 AM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] 2 quick questions

The problem (not to do with programming but rather the real world)
concerns
batches. Just as CPUs are made in large stamped volumes, and hence
chopped
into individual chips. The problem devolves into batch not individual
chips,
or eggs for that matter. Much as I love AutoNumbers, I also realize that
Intelligent Keys have a place in the world, and everything depends on
the
discipline.

A.
-- 
AccessD mailing list
AccessD at databaseadvisors.com
http://databaseadvisors.com/mailman/listinfo/accessd
Website: http://www.databaseadvisors.com
The information contained in this transmission is intended only for the
person or entity 
to which it is addressed and may contain II-VI Proprietary and/or II-VI
Business 
Sensitive material. If you are not the intended recipient, please
contact
the sender 
immediately and destroy the material in its entirety, whether electronic
or
hard copy. 
You are notified that any review, retransmission, copying, disclosure,
dissemination, 
or other use of, or taking of any action in reliance upon this
information
by persons 
or entities other than the intended recipient is prohibited.


-- 
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
The information contained in this transmission is intended only for the person or entity 
to which it is addressed and may contain II-VI Proprietary and/or II-VI Business 
Sensitive material. If you are not the intended recipient, please contact the sender 
immediately and destroy the material in its entirety, whether electronic or hard copy. 
You are notified that any review, retransmission, copying, disclosure, dissemination, 
or other use of, or taking of any action in reliance upon this information by persons 
or entities other than the intended recipient is prohibited.





More information about the AccessD mailing list