SQL转换时间的时分

 SELECT     WorkerNo, DutyTime, DATENAME(weekday, DutyTime) AS WeekDay, CycleType, CycleNumber, YnOnDuty,
                       CASE WHEN YnOnDuty = 0 THEN '休息' ELSE RIGHT('' + CAST((CASE WHEN (OneOnDuty - OneOnDuty % 60)
                       / 60 < 24 THEN (OneOnDuty - OneOnDuty % 60) / 60 ELSE (OneOnDuty - OneOnDuty % 60) / 60 - 24 END) AS varchar(2)), 2)
                       + ':' + RIGHT('' + CAST(OneOnDuty % 60 AS varchar(2)), 2) END AS OneOnduty,
                       CASE WHEN YnOnDuty = 0 THEN '休息' ELSE RIGHT('' + CAST((CASE WHEN (OneOffDuty - OneOffDuty % 60)
                       / 60 < 24 THEN (OneOffDuty - OneOffDuty % 60) / 60 ELSE (OneOffDuty - OneOffDuty % 60) / 60 - 24 END) AS varchar(2)), 2)
                       + ':' + RIGHT('' + CAST(OneOffDuty % 60 AS varchar(2)), 2) END AS OneOffduty, 
Creationtime, CreationName, EditTime, EditName,
 StartUsingDate, Description, ID, (CASE WHEN datediff(day, DutyTime, getdate()) > 0 THEN 1 ELSE 0 END) AS Yn
 FROM         dbo.T_OnDutyOrder