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From: "Chris Bipes" <chris.bipes@xxxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 12/14/2009 03:24 PM
Subject: RE: Constraints, anyone?
Sent by: midrange-l-bounces@xxxxxxxxxxxx
Think of it this way. I have my AR code master file. Primary unique key
= ARCODE 5 A. Now in my ARTRANS file I have the ARCODE. Can I delete an
record from ARCODE when I have active transactions that reference it? Same
for Order Header / Detail type references. I am sure you and other have
tons of other relationships like this.
In fact the AR code master may have GL Codes that point to the GL Code
Master.
Chris Bipes
Director of Information Services
CrossCheck, Inc.
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [
mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of James H. H. Lampert
Sent: Monday, December 14, 2009 1:05 PM
To: Midrange Systems Technical Discussion
Subject: Re: Constraints, anyone?
Something I don't quite get is the matter of "primary key" constraints.
Assuming that a physical file is uniquely keyed, how do these
constraints relate to the file's own keys?
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