Prueba este -
DECLARE @temp TABLE
(
UserID INT,
Checktime DATETIME,
CheckStatus CHAR(1)
)
INSERT INTO @temp (UserID, Checktime, CheckStatus)
VALUES
(3175, '20131222 07:02:10.000', 'I'),
(3175, '20131222 13:01:01.000', 'O'),
(3175, '20131222 13:49:54.000', 'I'),
(3175, '20131222 13:49:55.000', 'I'),
(3175, '20131222 15:58:42.000', 'O'),
(3175, '20131223 06:02:58.000', 'I'),
(3175, '20131223 14:00:29.000', 'O'),
(3175, '20131224 05:17:09.000', 'I'),
(3175, '20131224 12:34:25.000', 'O'),
(3175, '20131224 12:34:26.000', 'O')
SELECT
t.UserID
, [Date] = DATEADD(dd, 0, DATEDIFF(dd, 0, t.CheckIn))
, CheckIn = CONVERT(VARCHAR(10), t.CheckIn, 108)
, CheckOut = CONVERT(VARCHAR(10), t.CheckOut, 108)
, [Hours] = CAST(DATEDIFF(MINUTE, t.CheckIn, t.CheckOut) / 60. AS DECIMAL(10,2))
FROM (
SELECT
t.UserID
, CheckIn = t.Checktime
, CheckOut = r.Checktime
, RowNum = ROW_NUMBER() OVER (PARTITION BY t.UserID, r.Checktime ORDER BY 1/0)
FROM @temp t
OUTER APPLY (
SELECT TOP 1 *
FROM @temp t2
WHERE t2.UserID = t.UserID
AND t2.Checktime > t.Checktime
AND DATEADD(dd, 0, DATEDIFF(dd, 0, t.Checktime)) = DATEADD(dd, 0, DATEDIFF(dd, 0, t2.Checktime))
AND t2.CheckStatus = 'O'
ORDER BY t2.Checktime
) r
WHERE t.CheckStatus = 'I'
) t
WHERE t.RowNum = 1
Salida -
UserID Date CheckIn CheckOut Hours
----------- ----------------------- ---------- ---------- --------
3175 2013-12-22 00:00:00.000 07:02:10 13:01:01 5.98
3175 2013-12-22 00:00:00.000 13:49:54 15:58:42 2.15
3175 2013-12-23 00:00:00.000 06:02:58 14:00:29 7.97
3175 2013-12-24 00:00:00.000 05:17:09 12:34:25 7.28
