Re: SQL Date function question

Interesting enough, every company I've been at already had a
"calendar" table of some sort...

Though it wasn't usually designed for SQL usage, need to add extra
fields and indexes; nor do i think the technique is familiar to most
RPG developers.

Joe Celko has some good articles (and books) that show examples of
using calendar tables.

Charles

On Fri, Jul 8, 2011 at 11:07 AM, Jon Paris <jon.paris@xxxxxxxxxxxxxx> wrote:

On Jul 8, 2011, at 9:38 AM, midrange-l-request@xxxxxxxxxxxx wrote:

  With so few acknowledgments on the use of calendar files, I was often
left wondering if the need to JOIN to a calendar file somehow was a
turnoff for many.

I think you are right. We've all been conditioned by "don't create too many tables" and even more to "Don't create too many logicals/indexes". For the most part the rationale behind these beliefs is long-since gone but it is hard to force them out of our brains. When I first came upon this I thought that it would be inefficient - but then saw how much easier the code was to understand and discovered that the performance was not an issue (particularly when compared with 2 or three nested function calls) and decided to give it a try.

Jon Paris

www.partner400.com
www.SystemiDeveloper.com




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