Attendance record from bio-metric device

问题

Here is my data

|Id     |EmpCode    |CheckInCheckOutDate        |WorkDate                   |InOutMode  
|247    |51         |2017-02-13 20:08:52.000    |2017-02-13 20:08:52.000    |0          
|392    |51         |2017-02-13 22:38:51.000    |2017-02-13 22:38:51.000    |1          
|405    |51         |2017-02-13 22:59:18.000    |2017-02-13 22:59:18.000    |0          
|415    |51         |2017-02-13 23:18:17.000    |2017-02-13 23:18:17.000    |1          
|423    |51         |2017-02-13 23:33:44.000    |2017-02-13 23:33:44.000    |0          
|456    |51         |2017-02-14 01:30:15.000    |2017-02-13 01:30:15.000    |1          
|463    |51         |2017-02-14 02:52:02.000    |2017-02-13 02:52:02.000    |0          
|483    |51         |2017-02-14 05:11:54.000    |2017-02-13 05:11:54.000    |1          
|1034   |51         |2017-02-14 20:09:23.000    |2017-02-14 20:09:23.000    |0          
|1172   |51         |2017-02-14 21:59:23.000    |2017-02-14 21:59:23.000    |1          
|1217   |51         |2017-02-14 22:30:28.000    |2017-02-14 22:30:28.000    |0          
|1238   |51         |2017-02-14 22:49:51.000    |2017-02-14 22:49:51.000    |1          
|1257   |51         |2017-02-14 23:19:10.000    |2017-02-14 23:19:10.000    |0          
|1315   |51         |2017-02-15 05:04:16.000    |2017-02-14 05:04:16.000    |1          
|1323   |51         |2017-02-15 05:05:17.000    |2017-02-14 05:05:17.000    |0          
|1329   |51         |2017-02-15 05:08:17.000    |2017-02-14 05:08:17.000    |1
|1330   |51         |2017-02-15 05:08:18.000    |2017-02-14 05:08:18.000    |1

I have used this code:

SELECT EmpCode,
        CAST(I.CheckInCheckOutDate AS DATE) AS [Date],
        CAST(I.WorkDate AS DATE) AS WorkDate,
        CONVERT(VARCHAR(10), I.WorkDate, 108) AS CheckIn,
        CONVERT(VARCHAR(10), O.WorkDate, 108) AS CheckOut,
       CAST(DATEDIFF(second,I.WorkDate,O.WorkDate)/3600.0 AS DECIMAL(18,9)) [TotalHours]
FROM tblAttendance I
OUTER APPLY (
                SELECT TOP 1 WorkDate,inOutMode FROM tblAttendance t
                WHERE t.EmpCode = I.EmpCode AND t.WorkDate > I.WorkDate
                ORDER BY t.WorkDate
            ) O

WHERE I.inOutMode = 0
AND O.inOutMode = 1 and I.empCode=51

The result of code is:

|EmpCode|Date|      |WorkDate   |CheckIn    |CheckOut   |TotalHours
|51     |2017-02-13 |2017-02-13 |20:08:52   |22:38:51   |2.499722000
|51     |2017-02-13 |2017-02-13 |22:59:18   |23:18:17   |0.316388000
|51     |2017-02-13 |2017-02-13 |23:33:44   |05:04:16   |5.508888000
|51     |2017-02-14 |2017-02-13 |02:52:02   |05:11:54   |2.331111000
|51     |2017-02-14 |2017-02-14 |20:09:23   |21:59:23   |1.833333000
|51     |2017-02-14 |2017-02-14 |22:30:28   |22:49:51   |0.323055000
|51     |2017-02-15 |2017-02-14 |05:05:17   |05:08:17   |0.050000000

Whenever I am adding TotalHours hours Group By WorkDate, it is giving incorrect answer.

回答1:

Perhaps what you need is to add an explicit sum: http://www.w3resource.com/sql/aggregate-functions/sum-with-group-by.php:

SELECT TOP 1 WorkDate, inOutMode, SUM (TotalHours) FROM tblAttendance t

WHERE t.EmpCode = I.EmpCode AND t.WorkDate > I.WorkDate
GROUP BY WorkDate, inOutMode

ORDER BY t.WorkDate

(untested, sorry if this doesn't help - I know very limited SQL :P)

来源：https://stackoverflow.com/questions/42253727/attendance-record-from-bio-metric-device