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Sql add days to a date taking into account the weekend

Posted on 2011-10-10
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Last Modified: 2012-05-12
Hi,

I'm trying to calculate a due date for an order based on a set lead days parameter.
Ideally 'd like to do this in a function.

I have an order creation date.
From that I want to add 5 working days to it.
However, if part or all of the weekend fall within the 5 days I want to be able to take that into account

So an order placed on Thursday would be due the follwing Thursday.
i.e 5 working days plus 2 non working days.

Can anyone help me with the syntax.
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Question by:EWHTLC
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LVL 39

Expert Comment

by:Aaron Tomosky
ID: 36942571
This has been discusse many times. Ere is a decent article
http://stackoverflow.com/questions/252519/count-work-days-between-two-dates-in-t-sql
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Author Comment

by:EWHTLC
ID: 36943187
THanks for that.
It does calculate the number of working days between 2 dates.

However, I'd like to be able to add 5 working days to the startdate.
So I need to calculate the end date
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Accepted Solution

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Aaron Tomosky earned 1600 total points
ID: 36943273
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Assisted Solution

by:Anthony Perkins
Anthony Perkins earned 400 total points
ID: 36945966
You don't need a UDF for this.  All you need is to build a "Workdays" table from here to a reasonable number of years in the future, than your query becomes a trivial calculation.  The big advantage of this approach is that you can also now expand to include Holidays as well.  Let me know if you are interested.
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Author Comment

by:EWHTLC
ID: 36947485
All a big help
I did actually get round to using a udf to do it.
Seems to work a treat

I'm pleased to say it's not that differnt from the solution posted by aarontomosky.

Thanks Everyone
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Author Closing Comment

by:EWHTLC
ID: 36947487
Thanks
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