Determining if a Date is a Weekday in T-SQL
create function fn_IsWeekDay
(
@date datetime
)
returns bit
as
begin
declare @dtfirst int
declare @dtweek int
declare @iswkday bit
set @dtfirst = @@datefirst - 1
set @dtweek = datepart(weekday, @date) - 1
if (@dtfirst + @dtweek) % 7 not in (5, 6)
set @iswkday = 1 --business day
else
set @iswkday = 0 --weekend
return @iswkday
end
source http://ryanfarley.com
