Reply to Re: Updating the SQL key value

Your name:

Reply:


Posted by Toby A Inkster on 03/30/07 12:29

bill wrote:

> I will add a autonumbering PK

Auto-numbered synthetic primary keys are the root of all evil. They usually
indicate a lazy approach to database design. There is almost always a
natural column or combination of columns that can be used as a primary key
without the need to add an extra, redundant numerical column which doesn't
contain any useful information.

Assuming that the you never plan on having two events that occur
concurrently, your "order" column is a perfect natural candidate key.
(Though it's a little poorly named, given that ORDER is a SQL keyword.)

--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact
Geek of ~ HTML/SQL/Perl/PHP/Python*/Apache/Linux

* = I'm getting there!

[Back to original message]


Удаленная работа для программистов  •  Как заработать на Google AdSense  •  England, UK  •  статьи на английском  •  PHP MySQL CMS Apache Oscommerce  •  Online Business Knowledge Base  •  DVD MP3 AVI MP4 players codecs conversion help
Home  •  Search  •  Site Map  •  Set as Homepage  •  Add to Favourites

Copyright © 2005-2006 Powered by Custom PHP Programming

Сайт изготовлен в Студии Валентина Петручека
изготовление и поддержка веб-сайтов, разработка программного обеспечения, поисковая оптимизация