-Original Message-
From: clive [mailto:clive_li...@immigrationunit.com]
Sent: Friday, December 12, 2008 1:07 AM
To: PHP LIST
Subject: Re: [PHP] Re: Foreign Keys Question
Colin Guthrie wrote:
'Twas brillig, and tedd at 11/12/08 18:46 did gyre and gimble:
As for my Foreign Keys
In my enrollment database, we keep historical information. My client
is a big computer training organization (for which I also teach). The
enrollment information is quite fluid -- people are always canceling
or rescheduling. It is important for us to know a person's history.
$.02
Ken
On
Colin Guthrie wrote:
The ON DELETE CASCADE option is key here... DELETE FROM students
where student_id=1 will remove all traces of that student from the
db... all the course they've attended, all the instructors who have
taught them etc. keeps things nice and tidy without having to put the
Micah Gersten wrote:
Colin Guthrie wrote:
The ON DELETE CASCADE option is key here... DELETE FROM students
where student_id=1 will remove all traces of that student from the
db... all the course they've attended, all the instructors who have
taught them etc. keeps things nice and tidy without
Colin Guthrie wrote:
'Twas brillig, and tedd at 11/12/08 18:46 did gyre and gimble:
As for my Foreign Keys Question, I think the answer is that it
enforces rules upon the configuration (i.e., deleting, altering, and
such), but does not provide any significant service beyond that.
Well that's
On Fri, 2008-12-12 at 09:06 +0200, clive wrote:
Colin Guthrie wrote:
'Twas brillig, and tedd at 11/12/08 18:46 did gyre and gimble:
As for my Foreign Keys Question, I think the answer is that it
enforces rules upon the configuration (i.e., deleting, altering, and
such), but does not
Robert Cummings wrote:
It depends on the data. Certainly for student enrolments I would want a
paper trail (so to speak) and would just set a status field. But if it
was say, an online shopping cart or cached data... I'd just purge it.
Cheers,
Rob.
yes - you are right, I was just thinking
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