Sql add days to a date taking into account the weekend


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.
Eric HarrisDeveloperAsked:
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Aaron TomoskySD-WAN SimplifiedCommented:
This has been discusse many times. Ere is a decent article
Eric HarrisDeveloperAuthor Commented:
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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Anthony PerkinsCommented:
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.
Eric HarrisDeveloperAuthor Commented:
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
Eric HarrisDeveloperAuthor Commented:
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