Jesse,
I'll refrain from personal comments, but on CJ's quote, he's correct. Nulls
are an oddity. They cannot be true or false (<column_name> = NULL or
<column_name> != NULL), nor can they equal anything. They are in effect a third
logical state of nothingness. You also have to code most applications with
indicator variables to check for their existence. All in all a real pain in the
backside. BUT, if you give me the possibility that nulls exist in the data I
much prefer using them vs. many a third party solution of a single space. No
application that I can reasonably think of should use NULLS, except those pre-81
where there are obsolete columns.
Dick Goulet
____________________Reply Separator____________________
Author: "Jesse; Rich" <[EMAIL PROTECTED]>
Date: 10/14/2002 9:33 AM
On the link below is this quote from C.J.Date:
"I don't want you to think that my SQL solution to your problem means I
advocate the use of nulls. Nulls are a disaster."
Of course, he doesn't expound upon it (probably not a need except for
dummies like me). Anyone care to comment? (On the quote, not on my
dumminess...)
Rich
Rich Jesse System/Database Administrator
[EMAIL PROTECTED] Quad/Tech International, Sussex, WI USA
> -----Original Message-----
> From: Robson, Peter [mailto:[EMAIL PROTECTED]]
> Sent: Monday, October 14, 2002 4:59 AM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: Warehouse design: snowflake vs star schemas
>
>
> Just for the record (and perhaps to confirm that there are
> always two sides
> to a story). Readers may like to see the article Chris Date
> wrote to Ralph
> Kemball on the subject of business rules and integrity constraints:
>
> http://www.dbdebunk.com/kimball1.htm
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Jesse, Rich
INET: [EMAIL PROTECTED]
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: [EMAIL PROTECTED] (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.com
--
Author:
INET: [EMAIL PROTECTED]
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: [EMAIL PROTECTED] (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).
