我将入口扫描输入/输出系统中的绘图数据导入数据库，并在SQL脚本中编写计算以在Aspx网页中生成报告。
我有不同类型的班次模式
EP_SHIFT_NAME EP_SHIFT_DESC EP_SHIFT_TIMEFR EP_SHIFT_TIMETO
R1 Off Day 09:00 23:59
W1 W1 08:00 17:00
R2 Rest Day 09:00 23:59
D1 Day Shift 07:00 16:00
NS Normal Shift 08:00 17:30
E1 Day Shift 08:00 17:00
E2 Night Shift 20:00 05:00
N1 Night Shift 19:00 04:00
目前我遇到了一个问题
总实际工作时间（工作时间）为每天720分钟[每天12小时]（如果超过720分钟的工作时间被视为额外加班时间类别）。
从0700~1900（DAY）和1900~0700（NIGHT）计算中断扫描进出时间。
但是，如果计算时间晚到或早出的人是从最后一次和第一次扫描开始的。
任何人都可以帮助我或修改SQL脚本中的计算？
对于工作时间计算，我有一个想法，即每个班次类型（上次扫描时间 - EP_SHIFT_TIMEFROM）
SELECT CONVERT(VARCHAR(8),STUFF(STUFF(FIRSTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':'),112) AS SCANDATE
,FIRSTSCAN.EP_EMP_COMPANY
,FIRSTSCAN.EP_EMP_DEPT
,FIRSTSCAN.EP_EMP_ID
,FIRSTSCAN.EP_EMP_NAME
,FIRSTSCAN.EP_EMP_SECTION
,FIRSTSCAN.EP_EMP_SHIFT
,FIRSTSCAN.EP_SHIFT
,right(FIRSTSCAN.EP_SCAN_DATE,6) AS FIRSTSCAN
,right(LASTSCAN.EP_SCAN_DATE,6) AS LASTSCAN
,SCANTIMECAL.INFAB AS INFAB_MIN
,SCANTIMECAL.OUTFAB AS OUTFAB_MIN
,DATEDIFF(MI,CAST(STUFF(STUFF(FIRSTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)
,CAST(STUFF(STUFF(LASTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) AS WORK_MIN
,DATEDIFF(HOUR,CAST(STUFF(STUFF(FIRSTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)
,CAST(STUFF(STUFF(LASTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) AS WORK_HOUR
,CASE WHEN FIRSTSCAN.EP_SHIFT <> 'R1' AND FIRSTSCAN.EP_SHIFT <> 'R2'
THEN ROUND(CAST((DATEDIFF(MINUTE,CAST(STUFF(STUFF((CASE WHEN SHIFTCAL.EP_SHIFT = 'N1'
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,LEFT(FIRSTSCAN.EP_SCAN_DATE ,8)),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE LEFT(FIRSTSCAN.EP_SCAN_DATE ,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END),12,0,':'),15,0,':') AS DATETIME)
,CAST(STUFF(STUFF(LASTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) / 60.0) AS FLOAT),2)
ELSE ROUND(CAST((DATEDIFF(MINUTE,CAST(STUFF(STUFF(FIRSTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)
,CAST(STUFF(STUFF(LASTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) / 60.0) AS FLOAT),2) END AS OTWORK_HOUR
,CASE WHEN (FIRSTSCAN.EP_SHIFT = 'N1' OR FIRSTSCAN.EP_SHIFT = 'D1')
AND ROUND(CAST((DATEDIFF(MINUTE,CAST(STUFF(STUFF((CASE WHEN SHIFTCAL.EP_SHIFT = 'N1'
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,LEFT(FIRSTSCAN.EP_SCAN_DATE ,8)),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE LEFT(FIRSTSCAN.EP_SCAN_DATE ,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END),12,0,':'),15,0,':') AS DATETIME)
,CAST(STUFF(STUFF(LASTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) / 60.0) AS FLOAT),2) >= 3 THEN 3 - 0.25 END OTHOUR_FIX
,CASE WHEN (FIRSTSCAN.EP_SHIFT = 'N1' OR FIRSTSCAN.EP_SHIFT = 'D1') AND ROUND(CAST((DATEDIFF(MINUTE,CAST(STUFF(STUFF((CASE WHEN SHIFTCAL.EP_SHIFT = 'N1'
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,LEFT(FIRSTSCAN.EP_SCAN_DATE ,8)),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE LEFT(FIRSTSCAN.EP_SCAN_DATE ,8) + ' ' + REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END),12,0,':'),15,0,':') AS DATETIME)
,CAST(STUFF(STUFF(LASTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) / 60.0) AS FLOAT),2) >= 3
THEN ROUND(CAST((DATEDIFF(MINUTE,CAST(STUFF(STUFF((CASE WHEN SHIFTCAL.EP_SHIFT = 'N1'
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,LEFT(FIRSTSCAN.EP_SCAN_DATE ,8)),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE LEFT(FIRSTSCAN.EP_SCAN_DATE ,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END),12,0,':'),15,0,':') AS DATETIME),
CAST(STUFF(STUFF(LASTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) / 60.0) AS FLOAT) - 3,2) ELSE
CASE WHEN (FIRSTSCAN.EP_SHIFT = 'R1' OR FIRSTSCAN.EP_SHIFT = 'R2') THEN ROUND(CAST((DATEDIFF(MINUTE,CAST(STUFF(STUFF(FIRSTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)
,Cast(STUFF(Stuff(LASTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) / 60.0) AS FLOAT),2)END END OTHOUR_EXTRA
,CASE WHEN FIRSTSCAN.EP_SHIFT <> 'R1' AND FIRSTSCAN.EP_SHIFT <> 'R2' THEN FIRSTSCAN.LATEIN END LATEIN
,CASE WHEN FIRSTSCAN.EP_SHIFT <> 'R1' AND FIRSTSCAN.EP_SHIFT <> 'R2' THEN CASE WHEN SCANTIMECAL.OUTFAB >= SHIFTDESC.EP_SHIFT_OGRACE THEN 1 END END AS BREAK_ABNORMAL
,CASE WHEN FIRSTSCAN.EP_SHIFT <> 'R1' AND FIRSTSCAN.EP_SHIFT <> 'R2' THEN CASE WHEN RIGHT(LASTSCAN.EP_SCAN_DATE,6) < REPLACE(CONVERT(VARCHAR(8),
CONVERT(VARCHAR(8),SHIFTDESC.EP_SHIFT_TIMETO,108),108),':','') THEN 1 END END AS EARLYOUT_NORMAL
,(CASE WHEN FIRSTSCAN.EP_SHIFT<> 'NS' AND FIRSTSCAN.EP_SHIFT <> 'R1' AND FIRSTSCAN.EP_SHIFT <> 'R2'
THEN (CASE WHEN RIGHT(LASTSCAN.EP_SCAN_DATE,6) < REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+3,CONVERT(VARCHAR(8),SHIFTDESC.EP_SHIFT_TIMETO,108)),108),':','') THEN 1 END) END)AS EARLYOUT_SHIFT
FROM
(
SELECT
ROW_NUMBER() OVER(PARTITION BY SCANHIST.EP_EMP_ID,CASE WHEN RIGHT(SCANHIST.EP_SCAN_DATE,6) < '130000' AND SHIFTCAL.EP_SHIFT = 'N1'
THEN CONVERT(VARCHAR(8),DATEADD(DAY,-1,CONVERT(VARCHAR(8),LEFT(SCANHIST.EP_SCAN_DATE,8),112)),112)
ELSE LEFT(SCANHIST.EP_SCAN_DATE,8)
END ORDER BY SCANHIST.EP_EMP_ID) AS RowNum
,SCANHIST.EP_SCAN_DATE
,CASE WHEN RIGHT(SCANHIST.EP_SCAN_DATE,6) < '130000' AND SHIFTCAL.EP_SHIFT = 'N1'
THEN CONVERT(VARCHAR(8),DATEADD(DAY,-1,CONVERT(VARCHAR(8),LEFT(SCANHIST.EP_SCAN_DATE,8),112)),112)
ELSE LEFT(SCANHIST.EP_SCAN_DATE,8) END AS EMP_WORKDATE
,EMPINFO.EP_EMP_COMPANY
,SCANHIST.EP_EMP_ID
,SCANHIST.EP_EMP_NAME
,SCANHIST.EP_EMP_DEPT
,SCANHIST.EP_EMP_SECTION
,SCANHIST.EP_EMP_SHIFT
,SHIFTCAL.EP_SHIFT
,SCANHIST.EP_SCAN_ID
,SCANHIST.EP_TRANS_LOC
,CASE WHEN RIGHT(SCANHIST.EP_SCAN_DATE,6) > REPLACE(SHIFTDESC.EP_SHIFT_TIMEFR,':','') THEN 1 END AS LATEIN
FROM [AcmkIMS].[dbo].[EP_SCAN_HIST] SCANHIST
JOIN [AcmkIMS].[dbo].[EP_EMP_INFO] EMPINFO
ON EMPINFO.EP_EMP_ID = SCANHIST.EP_EMP_ID
JOIN [AcmkIMS].[dbo].[EP_SHIFT_CALENDAR] SHIFTCAL
ON SHIFTCAL.EP_SHIFT_NAME = SCANHIST.EP_EMP_SHIFT
AND SHIFTCAL.EP_SHIFT_DATE = LEFT(SCANHIST.EP_SCAN_DATE,8)
JOIN [AcmkIMS].[dbo].[EP_SHIFT_DESC] SHIFTDESC
ON SHIFTDESC.EP_SHIFT_NAME = SHIFTCAL.EP_SHIFT
WHERE 1=1
AND SCANHIST.EP_SCAN_DATE >= '20130524' + ' ' +
CASE WHEN (SHIFTCAL.EP_SHIFT <> 'R1' AND SHIFTCAL.EP_SHIFT <> 'R2')
THEN REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,-4,SHIFTDESC.EP_SHIFT_TIMEFR + ':00'),108),':','')
ELSE REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,-0,SHIFTDESC.EP_SHIFT_TIMEFR + ':00'),108),':','') END
AND SCANHIST.EP_SCAN_DATE < CASE WHEN (SHIFTCAL.EP_SHIFT = 'N1')
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,'20130526'),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE CASE WHEN (SHIFTCAL.EP_SHIFT = 'R1' OR SHIFTCAL.EP_SHIFT = 'R2')
THEN '20130526' + ' ' + REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE '20130526' + ' ' + REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END END
AND SCANHIST.EP_TRANS_LOC = 'IN'
AND EMPINFO.EP_EMP_LEVEL > '10'
--AND EMPINFO.EP_EMP_LEVEL <> ''
--AND SCANHIST.EP_EMP_DEPT = ''
--AND SCANHIST.EP_EMP_SECTION = ''
--AND SCANHIST.EP_EMP_SHIFT = ''
--AND SCANHIST.EP_EMP_ID = ''
AND SCANHIST.EP_EMP_SHIFT ='A'
)FIRSTSCAN
OUTER APPLY
(
SELECT TOP 1
SCANHIST.EP_SCAN_DATE
,EMPINFO.EP_EMP_COMPANY
,SCANHIST.EP_EMP_ID
,SCANHIST.EP_EMP_NAME
,SCANHIST.EP_EMP_DEPT
,SCANHIST.EP_EMP_SECTION
,SCANHIST.EP_EMP_SHIFT
,SHIFTCAL.EP_SHIFT
,SCANHIST.EP_SCAN_ID
,SCANHIST.EP_TRANS_LOC
FROM [AcmkIMS].[dbo].[EP_SCAN_HIST] SCANHIST
JOIN [AcmkIMS].[dbo].[EP_EMP_INFO] EMPINFO
ON EMPINFO.EP_EMP_ID = SCANHIST.EP_EMP_ID
JOIN [AcmkIMS].[dbo].[EP_SHIFT_CALENDAR] SHIFTCAL
ON SHIFTCAL.EP_SHIFT_NAME = SCANHIST.EP_EMP_SHIFT
AND SHIFTCAL.EP_SHIFT_DATE = LEFT(FIRSTSCAN.EP_SCAN_DATE,8)
JOIN [AcmkIMS].[dbo].[EP_SHIFT_DESC] SHIFTDESC
ON SHIFTDESC.EP_SHIFT_NAME = SHIFTCAL.EP_SHIFT
WHERE 1=1
AND SCANHIST.EP_SCAN_DATE > FIRSTSCAN.EP_SCAN_DATE
AND SCANHIST.EP_SCAN_DATE < CASE WHEN (FIRSTSCAN.EP_SHIFT = 'N1')
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,LEFT(FIRSTSCAN.EP_SCAN_DATE,8)),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
else CASE WHEN (FIRSTSCAN.EP_SHIFT = 'R1' OR FIRSTSCAN.EP_SHIFT = 'R2')
THEN
left(FIRSTSCAN.EP_SCAN_DATE,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') ELSE
left(FIRSTSCAN.EP_SCAN_DATE,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END END
AND SCANHIST.EP_TRANS_LOC = 'OUT'
AND EMPINFO.EP_EMP_LEVEL > '10'
AND EMPINFO.EP_EMP_LEVEL <> ''
AND SCANHIST.EP_EMP_ID = FIRSTSCAN.EP_EMP_ID
ORDER BY SCANHIST.EP_SCAN_DATE )LASTSCAN
OUTER APPLY
(
SELECT
GROUP_SCANTIMECAL.EP_EMP_ID
,SUM(CAST(GROUP_SCANTIMECAL.INFAB_MIN AS FLOAT)) AS INFAB
,SUM(CAST(GROUP_SCANTIMECAL.OUTFAB_MIN AS FLOAT)) AS OUTFAB
FROM
(
SELECT SCANHIST.EP_SCAN_DATE
,SCANHIST.EP_EMP_ID
,SCANHIST.EP_EMP_NAME
,SCANHIST.EP_EMP_DEPT
,SCANHIST.EP_EMP_SECTION
,SCANHIST.EP_EMP_SHIFT
,SCANHIST.EP_TRANS_LOC
,DATEDIFF(MI,CAST(STUFF(STUFF(SCANHIST.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME),
CAST(STUFF(STUFF(NEXTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) AS INFAB_MIN
,DATEDIFF(MI,CAST(STUFF(STUFF(NEXTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME),
CAST(STUFF(STUFF(PREVSCAN.EP_SCAN_DATE,12,0,':'),15,0,':') AS DATETIME)) AS OUTFAB_MIN
FROM [AcmkIMS].[dbo].[EP_SCAN_HIST] SCANHIST
OUTER APPLY
(
SELECT TOP 1
NEXTSCAN.EP_SCAN_DATE
,NEXTSCAN.EP_EMP_ID
,NEXTSCAN.EP_EMP_NAME
,NEXTSCAN.EP_EMP_DEPT
,NEXTSCAN.EP_EMP_SECTION
,NEXTSCAN.EP_EMP_SHIFT
,NEXTSCAN.EP_SCAN_ID
,NEXTSCAN.EP_TRANS_DESC
,NEXTSCAN.EP_TRANS_LOC
FROM [AcmkIMS].[dbo].[EP_SCAN_HIST] NEXTSCAN
JOIN [AcmkIMS].[dbo].[EP_EMP_INFO] EMPINFO
ON EMPINFO.EP_EMP_ID = NEXTSCAN.EP_EMP_ID
JOIN [AcmkIMS].[dbo].[EP_SHIFT_CALENDAR] SHIFTCAL
ON SHIFTCAL.EP_SHIFT_NAME = NEXTSCAN.EP_EMP_SHIFT
AND SHIFTCAL.EP_SHIFT_DATE = LEFT(FIRSTSCAN.EP_SCAN_DATE,8)
JOIN [AcmkIMS].[dbo].[EP_SHIFT_DESC] SHIFTDESC
ON SHIFTDESC.EP_SHIFT_NAME = SHIFTCAL.EP_SHIFT
WHERE 1=1
AND SCANHIST.EP_SCAN_ID = NEXTSCAN.EP_SCAN_ID
AND NEXTSCAN.EP_SCAN_DATE > SCANHIST.EP_SCAN_DATE
AND NEXTSCAN.EP_SCAN_DATE < CASE WHEN (FIRSTSCAN.EP_SHIFT = 'N1')
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,LEFT(NEXTSCAN.EP_SCAN_DATE,8)),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE CASE WHEN (FIRSTSCAN.EP_SHIFT = 'R1' OR FIRSTSCAN.EP_SHIFT = 'R2')
THEN
LEFT(NEXTSCAN.EP_SCAN_DATE,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE
LEFT(NEXTSCAN.EP_SCAN_DATE,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END END
AND NEXTSCAN.EP_TRANS_LOC = 'OUT'
ORDER BY NEXTSCAN.EP_SCAN_DATE
)NEXTSCAN
OUTER APPLY
(
SELECT TOP 1
PREVSCAN.EP_SCAN_DATE
,PREVSCAN.EP_EMP_ID
,PREVSCAN.EP_EMP_NAME
,PREVSCAN.EP_EMP_DEPT
,PREVSCAN.EP_EMP_SECTION
,PREVSCAN.EP_EMP_SHIFT
,PREVSCAN.EP_SCAN_ID
,PREVSCAN.EP_TRANS_DESC
,PREVSCAN.EP_TRANS_LOC
FROM [AcmkIMS].[dbo].[EP_SCAN_HIST] PREVSCAN
JOIN [AcmkIMS].[dbo].[EP_EMP_INFO] EMPINFO
ON EMPINFO.EP_EMP_ID = PREVSCAN.EP_EMP_ID
JOIN [AcmkIMS].[dbo].[EP_SHIFT_CALENDAR] SHIFTCAL
ON SHIFTCAL.EP_SHIFT_NAME = PREVSCAN.EP_EMP_SHIFT
AND SHIFTCAL.EP_SHIFT_DATE = LEFT(FIRSTSCAN.EP_SCAN_DATE,8)
JOIN [AcmkIMS].[dbo].[EP_SHIFT_DESC] SHIFTDESC
ON SHIFTDESC.EP_SHIFT_NAME = SHIFTCAL.EP_SHIFT
WHERE 1=1
AND SCANHIST.EP_SCAN_ID = PREVSCAN.EP_SCAN_ID
AND PREVSCAN.EP_SCAN_DATE > SCANHIST.EP_SCAN_DATE
AND PREVSCAN.EP_SCAN_DATE < CASE WHEN (FIRSTSCAN.EP_SHIFT = 'N1')
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,LEFT(SCANHIST.EP_SCAN_DATE,8)),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE CASE WHEN (FIRSTSCAN.EP_SHIFT = 'R1' OR FIRSTSCAN.EP_SHIFT = 'R2')
THEN
LEFT(SCANHIST.EP_SCAN_DATE,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE
LEFT(SCANHIST.EP_SCAN_DATE,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END END
AND PREVSCAN.EP_TRANS_LOC = 'IN'
ORDER BY PREVSCAN.EP_SCAN_DATE
)PREVSCAN
JOIN [AcmkIMS].[dbo].[EP_EMP_INFO] EMPINFO
ON EMPINFO.EP_EMP_ID = SCANHIST.EP_EMP_ID
JOIN [AcmkIMS].[dbo].[EP_SHIFT_CALENDAR] SHIFTCAL
ON SHIFTCAL.EP_SHIFT_NAME = SCANHIST.EP_EMP_SHIFT
AND SHIFTCAL.EP_SHIFT_DATE = LEFT(FIRSTSCAN.EP_SCAN_DATE,8)
JOIN [AcmkIMS].[dbo].[EP_SHIFT_DESC] SHIFTDESC
ON SHIFTDESC.EP_SHIFT_NAME = SHIFTCAL.EP_SHIFT
WHERE 1=1
AND SCANHIST.EP_SCAN_DATE >= FIRSTSCAN.EP_SCAN_DATE
AND SCANHIST.EP_SCAN_DATE < CASE WHEN (FIRSTSCAN.EP_SHIFT = 'N1')
THEN CONVERT(VARCHAR(8),DATEADD(DAY,+1,LEFT(FIRSTSCAN.EP_SCAN_DATE,8)),112) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') ELSE
CASE WHEN (FIRSTSCAN.EP_SHIFT = 'R1' OR FIRSTSCAN.EP_SHIFT = 'R2')
THEN
LEFT(FIRSTSCAN.EP_SCAN_DATE,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+0,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','')
ELSE
LEFT(FIRSTSCAN.EP_SCAN_DATE,8) + ' ' +
REPLACE(CONVERT(VARCHAR(8),DATEADD(HOUR,+6,SHIFTDESC.EP_SHIFT_TIMETO + ':00'),108),':','') END END
AND SCANHIST.EP_EMP_ID = FIRSTSCAN.EP_EMP_ID
AND SCANHIST.EP_TRANS_LOC = 'IN'
)GROUP_SCANTIMECAL
GROUP BY GROUP_SCANTIMECAL.EP_EMP_ID
)SCANTIMECAL
JOIN [AcmkIMS].[dbo].[EP_SHIFT_CALENDAR] SHIFTCAL
ON SHIFTCAL.EP_SHIFT_NAME = FIRSTSCAN.EP_EMP_SHIFT
AND SHIFTCAL.EP_SHIFT_DATE = LEFT(FIRSTSCAN.EP_SCAN_DATE,8)
JOIN [AcmkIMS].[dbo].[EP_SHIFT_DESC] SHIFTDESC
ON SHIFTDESC.EP_SHIFT_NAME = SHIFTCAL.EP_SHIFT
WHERE 1=1
AND FIRSTSCAN.RowNum = 1
AND CONVERT(VARCHAR(8),STUFF(STUFF(FIRSTSCAN.EP_SCAN_DATE,12,0,':'),15,0,':'),112) BETWEEN '20130524' AND '20130526'
ORDER BY
FIRSTSCAN.EP_EMP_ID