Calculate time difference (only working hours) in minutes between two dates

Question

I need to calculate the number of \"active minutes\" for an event within a database. The start-time is well known.

The complication is that these active minutes sho

Answer 1

I came here looking for an answer to a very similar question - I needed to get the minutes between 2 dates excluding weekends and excluding hours outside of 08:30 and 18:00. After a bit of hacking around, I think i have it sorted. Below is how I did it. thoughts are welcome - who knows, maybe one day I'll sign up to this site :)

create function WorkingMinutesBetweenDates(@dteStart datetime, @dteEnd datetime)
returns int
as
begin

declare @minutes int
set @minutes = 0

while @dteEnd>=@dteStart
    begin

        if  datename(weekday,@dteStart) <>'Saturday' and  datename(weekday,@dteStart)<>'Sunday'
            and (datepart(hour,@dteStart) >=8 and datepart(minute,@dteStart)>=30 )
            and (datepart(hour,@dteStart) <=17)

            begin
                set @minutes = @minutes + 1
            end     

        set @dteStart = dateadd(minute,1,@dteStart)
    end

return @minutes
end
go