Question

I need to calculate the DateDiff (hours) between two dates, but only during business-hours (8:30 – 16:00, no weekends). This result will then be put into the Reaction_Time column as per the example below.

 ID           Date           Reaction_Time   Overdue 1    29.04.2003 15:00:00                       1    30.04.2003 11:00:00        3:30         2    30.04.2003 14:00:00                       2    01.05.2003 14:00:00        7:30          YES 

*Note: I didn’t check to see if the dates in example were holidays.

I’m using SQL Server 2005

This will be combined with a bigger query, but for now all I need is this to get started, I’ll try to figure out how to put it all together on my own. Thanks for the help!

Edit: Hey, thanks everyone for the replies. But due to the obvious complexity of a solution on SQL side, it was decided we would do this in Excel instead as that’s where the report will be moved anyway. Sorry for the trouble, but I really figured it would be simpler than this. As it is, we just don’t have the time.

Answer 1

DECLARE @BusHourStart DATETIME, @BusHourEnd DATETIME SELECT @BusHourStart = '08:30:00', @BusHourEnd = '16:00:00' DECLARE @BusMinutesStart INT, @BusMinutesEnd INT SELECT @BusMinutesStart = DATEPART(minute,@BusHourStart)+DATEPART(hour,@BusHourStart)*60,  @BusMinutesEnd = DATEPART(minute,@BusHourEnd)+DATEPART(hour,@BusHourEnd)*60  DECLARE @Dates2 TABLE (ID INT, DateStart DATETIME, DateEnd DATETIME) INSERT INTO @Dates2 SELECT 1, '15:00:00 04/29/2003', '11:00:00 04/30/2003' UNION SELECT 2, '14:00:00 04/30/2003', '14:00:00 05/01/2003' UNION SELECT 3, '14:00:00 05/02/2003', '14:00:00 05/06/2003' UNION SELECT 4, '14:00:00 05/02/2003', '14:00:00 05/04/2003' UNION SELECT 5, '07:00:00 05/02/2003', '14:00:00 05/02/2003' UNION SELECT 6, '14:00:00 05/02/2003', '23:00:00 05/02/2003' UNION SELECT 7, '07:00:00 05/02/2003', '08:00:00 05/02/2003' UNION SELECT 8, '22:00:00 05/02/2003', '23:00:00 05/03/2003' UNION SELECT 9, '08:00:00 05/03/2003', '23:00:00 05/04/2003' UNION SELECT 10, '07:00:00 05/02/2003', '23:00:00 05/02/2003'   -- SET DATEFIRST to U.S. English default value of 7. SET DATEFIRST 7  SELECT ID, DateStart, DateEnd, CONVERT(VARCHAR, Minutes/60) +':'+ CONVERT(VARCHAR, Minutes % 60) AS ReactionTime FROM (      SELECT ID, DateStart, DateEnd, Overtime,         CASE              WHEN DayDiff = 0 THEN                  CASE                      WHEN (MinutesEnd - MinutesStart - Overtime) > 0 THEN (MinutesEnd - MinutesStart - Overtime)                      ELSE 0                      END             WHEN DayDiff > 0  THEN                  CASE                      WHEN (StartPart + EndPart - Overtime) > 0 THEN (StartPart + EndPart - Overtime)                      ELSE 0                      END + DayPart             ELSE 0         END AS Minutes      FROM(         SELECT ID, DateStart, DateEnd, DayDiff, MinutesStart, MinutesEnd,                 CASE WHEN(@BusMinutesStart - MinutesStart) > 0 THEN (@BusMinutesStart - MinutesStart) ELSE 0 END +                 CASE WHEN(MinutesEnd - @BusMinutesEnd) > 0 THEN (MinutesEnd - @BusMinutesEnd) ELSE 0 END AS Overtime,                  CASE WHEN(@BusMinutesEnd - MinutesStart) > 0 THEN (@BusMinutesEnd - MinutesStart) ELSE 0 END AS StartPart,                 CASE WHEN(MinutesEnd - @BusMinutesStart) > 0 THEN (MinutesEnd - @BusMinutesStart) ELSE 0 END AS EndPart,                 CASE WHEN DayDiff > 1 THEN (@BusMinutesEnd - @BusMinutesStart)*(DayDiff - 1) ELSE 0 END AS DayPart         FROM (                 SELECT DATEDIFF(d,DateStart, DateEnd) AS DayDiff, ID, DateStart, DateEnd,                   DATEPART(minute,DateStart)+DATEPART(hour,DateStart)*60 AS MinutesStart,                 DATEPART(minute,DateEnd)+DATEPART(hour,DateEnd)*60 AS MinutesEnd                  FROM (                         SELECT ID,                                 CASE                                          WHEN DATEPART(dw, DateStart) = 7                                          THEN DATEADD(SECOND, 1, DATEADD(DAY, DATEDIFF(DAY, 0, DateStart), 2))                                         WHEN DATEPART(dw, DateStart) = 1                                          THEN DATEADD(SECOND, 1, DATEADD(DAY, DATEDIFF(DAY, 0, DateStart), 1))                                 ELSE DateStart END AS DateStart,                                 CASE                                          WHEN DATEPART(dw, DateEnd) = 7                                          THEN DATEADD(SECOND, -1, DATEADD(DAY, DATEDIFF(DAY, 0, DateEnd), 0))                                         WHEN DATEPART(dw, DateEnd) = 1                                          THEN DATEADD(SECOND, -1, DATEADD(DAY, DATEDIFF(DAY, 0, DateEnd), -1))                                 ELSE DateEnd END AS DateEnd FROM @Dates2                 )Weekends         )InMinutes     )Overtime )Calculation