This is not correct, see this at example: From friday to mondey there are 4 days (or 3, depends on how you count ;-). your calcs: $day = 4 $weeks = 4 / 7 = 0 $weekend_day = 0 * 2 = 0 $business_days = 4 - 0 = 4
If you have 100 weeks, then it will be quite correct.
here is my solution:
$day = total_days_between_a_and_b;
$less = weekend_days_between_WeekDAY_a_and_WeekDAY_b (for example: from friday to Mondey, then it will be 2)
$weeks = $day DIV 7;
$bussiness_days = $day - $weeks * 2 - $less;
my example again: $day = 4; $less = 2; $weeks = 0; $bussiness_days = 4 - 0 * 2 - 2 = 2
or use a function from a programming language, if available. You have to deal also with some special days (12-24 / 12-25 and so on).
greetings from Switzerland
Patrick
Joe Stump wrote:
I'm not sure of an exact query, but if you can get the total number of days you can mathmatically get the biz days with the following math (in psuedo code):
$days = total_days_between_a_and_b; $weeks = ($days / 7); $weekend_days = $weeks * 2; $business_days = ($days - $weekend_days);
Hope this helps. There may be more elegant ways of getting such a value. This doesn't take into account day A being wednesday. You might be able to do a SELECT COUNT(*) on evaluating your date to it's Day value in ('Mon','Tue','Wed','Thu','Fri')
Check the date commands.
--Joe
-- Joe Stump <[EMAIL PROTECTED]> http://www.joestump.net "Label makers are proof God wants Sys Admins to be happy."
-----Original Message----- From: Lucas Cowgar [mailto:[EMAIL PROTECTED] Sent: Monday, February 24, 2003 9:59 AM To: MySQL Mailing List Subject: # of Business Days?
Can anyone out there help me with a SQL query? I need to find the number of business days between date a and b? Obviously finding simply the number of days is easy, but I have no clue how to find the number of business days. TIA!
Lucas Cowgar Information Technologies Department Eldorado Services Group Inc. http://www.eldoserv.com [EMAIL PROTECTED] (330) 861-3009
"All your base are belong to us"
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