Add business days to date in SQL without loops

Question

I currently have a function in my SQL database that adds a certain amount of business days to a date, e.g. if you enter a date that is a Thursday and add two days, it will r

Answer 1

I don't have Sql Server at the moment to test but this is the idea:

ALTER FUNCTION [dbo].[AddWorkDaysToDate]
(   
@fromDate       datetime,
@daysToAdd      int
)
RETURNS datetime
AS
BEGIN   
DECLARE @dw integer
DECLARE @toDate datetime

set datefirst 1
set @toDate = dateadd(day, @daysToAdd, @fromDate)
set @dw = datepart(dw, @toDate)

if @dw > 5 set @toDate = dateadd(day, 8 - @dw, @toDate)

RETURN @toDate

END