Get Next business day conditionally

Question

Hi All,
I have a calendar table with all federal holidays, saturdays and sundays flagged to 1.
I need help in finding the next business day from givendate and that too Conditionallly.. means
Lets say today's date is 01/02/2014(wednesday) and I want to know the next businessday after 10 days which would be 01/16/2014(thursday). Exclude saturdays and sundays in between.
I started like this..but gives me wrong date..
Also, when 10th day is saturday or sunday or any holiday it should give next business day.
so i need help in tweaking my query.
select NextBusinessDay = min(a.Date)+10
from  [dbo].[Calendar] a
where
 a.Date > GETDATE() 
 and a.day_Name not in ('Saturday','Sunday')
 and a.IsHoliday <> 1
Thanks,
RH
sql

Answer 1

Try this out:
DECLARE @calendar TABLE (date DATE, holiday BIT, weekend BIT)
DECLARE @i INT = 0
SET NOCOUNT ON
WHILE @i < 50
BEGIN
INSERT INTO @calendar (date, holiday, weekend)
VALUES (DATEADD(DAY,@i,'2014-01-01'),0,CASE WHEN DATEPART(WEEKDAY,DATEADD(DAY,@i,'2014-01-01')) IN (1,7) THEN 1 ELSE 0 END)
SET @i = @i + 1
END
UPDATE @calendar SET holiday = 1 WHERE date = '2014-01-20'
SET NOCOUNT OFF
SELECT max(date)
FROM (
SELECT TOP 10 *
FROM @calendar
WHERE date > '2014-01-02'
AND holiday <> 1
AND weekend <> 1
) a
Obviously I've simulated your calendar, and forced a date into it.