DROP TABLE #ContactRoutingDetail
GO
CREATE TABLE #ContactRoutingDetail (queueTime INT, StartDateTime DATETIME)
GO
INSERT INTO #ContactRoutingDetail (queueTime, StartDateTime)
SELECT 10, '2008-01-31 11:23:32.937' UNION ALL -- THU
SELECT 10, '2008-01-31 11:22:32.937' UNION ALL
SELECT 10, '2008-01-30 11:21:32.937' UNION ALL -- WED
SELECT 10, '2008-01-30 11:19:32.937' UNION ALL
SELECT 10, '2008-01-29 11:18:32.937' UNION ALL -- TUE
SELECT 10, '2008-01-29 11:17:32.937' UNION ALL
SELECT 10, '2008-01-28 11:16:32.937' UNION ALL -- MON
SELECT 10, '2008-01-28 11:15:32.937' UNION ALL
SELECT 10, '2008-01-27 11:14:32.937' UNION ALL -- SUN
SELECT 10, '2008-01-27 11:13:32.937' UNION ALL
SELECT 10, '2008-01-27 00:00:00.000' UNION ALL
SELECT 10, '2008-01-26 23:59:59.997' UNION ALL -- SAT
SELECT 10, '2008-01-26 11:11:32.937' UNION ALL
SELECT 10, '2008-01-26 00:00:00.000' UNION ALL
SELECT 10, '2008-01-25 11:10:32.937' UNION ALL -- FRI
SELECT 10, '2008-01-25 11:09:32.937' UNION ALL
SELECT 10, '2008-01-24 11:08:32.937' UNION ALL -- THU
SELECT 10, '2008-01-24 11:07:32.937' UNION ALL
SELECT 10, '2008-01-23 11:06:32.937' UNION ALL -- WED
SELECT 10, '2008-01-23 11:05:32.937' UNION ALL
SELECT 10, '2008-01-22 11:04:32.937' UNION ALL -- TUE
SELECT 10, '2008-01-22 11:03:32.937' UNION ALL
SELECT 10, '2008-01-21 11:02:32.937' UNION ALL -- MON
SELECT 10, '2008-01-21 11:01:32.937' UNION ALL
SELECT 10, '2008-01-21 00:00:00.000' UNION ALL
SELECT 10, '2008-01-20 23:59:59.997' UNION ALL -- SUN
SELECT 10, '2008-01-20 11:59:32.937' UNION ALL
SELECT 10, '2008-01-20 00:00:00.000' 
GO

DECLARE @Today DATETIME
SET @Today = GETDATE() + 2 -- choose your run day / date for testing

SET DATEFIRST 1 -- monday is now considered the first day of the week (check the current setting)

SELECT SumDayTime, CONVERT(DATETIME, TextDate) AS StartDateTime 
FROM (
	SELECT SUM(queueTime) AS SumDayTime, CONVERT(CHAR(8), StartDateTime, 112) AS TextDate, DATENAME(dw,StartDateTime) AS DayName, DATEPART(dw, StartDateTime) AS DayNo
	FROM #ContactRoutingDetail 
	WHERE StartDateTime >= CONVERT(CHAR(8), @Today - (DATEPART(dw, @Today)+6), 112)
		AND StartDateTime < CONVERT(CHAR(8), @Today - (DATEPART(dw, @Today)+0), 112)
	GROUP BY CONVERT(CHAR(8), StartDateTime, 112), DATENAME(dw,StartDateTime), DATEPART(dw, StartDateTime)
) t
ORDER BY t.TextDate