我正在使用以下SQL查询来查找两个日期时间字段之间的差异，这是计算夜间时移，
例如
今天工作时间是190957年晚上直到下一个日期早上071152所以在工厂分钟之间的时间是628，但是工厂时间将计算798分钟（超过计算，超过工厂时间）。所以我想要准确分钟计算。
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