Calcuate Hours: Minutes:Seconds between two dates excluding Weekends

Question

Hello All,
@StartDate = '2014-06-21 13:37:30:037'
@EndDate = GetDate()
I want to find out Hours:Minutes:Seconds between the above dates EXCLUDING WEEKENDS.
Please help.
ReportingServices

Answer 1

Hi,
Give this a try:
DECLARE @StartDate DATETIME = '2014-06-21 13:37:30:037'
DECLARE @EndDate DATETIME = GETDATE()
DECLARE @Base INT = 86400 -- ie Seconds in a days
;WITH cteCalculation AS (
SELECT ((
(DATEDIFF(dd, @StartDate, @EndDate) + 1)
-(DATEDIFF(wk, @StartDate, @EndDate) * 2)
-(CASE WHEN DATENAME(dw, @StartDate) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(dw, @EndDate) = 'Saturday' THEN 1 ELSE 0 END)
) * @Base)
-(CASE WHEN DATENAME(dw, @StartDate) NOT IN ('Saturday', 'Sunday') THEN DATEPART(hh, @StartDate) * 3600 + DATEPART(mi, @StartDate) * 60 + DATEPART(ss, @StartDate) ELSE 0 END)
-(CASE WHEN DATENAME(dw, @EndDate) NOT IN ('Saturday', 'Sunday') THEN @Base - (DATEPART(hh, @EndDate) * 3600 + DATEPART(mi, @EndDate) * 60 + DATEPART(ss, @EndDate)) ELSE 0 END)
AS DiffInSec
SELECT @StartDate
,@EndDate
,CAST(DiffInSec / 3600 AS VARCHAR(10)) + ':' +
RIGHT('0' + CAST((DiffInSec % 3600) / 60 AS VARCHAR(2)), 2) + ':' +
RIGHT('0' + CAST((DiffInSec % 3600 % 60) AS VARCHAR(2)), 2)
FROM cteCalculation
Feel free to modify to suit your needs!
Hope this helps.
~J.