更好的选择获得时间在hh:mm格式从两个给定的时间

select cast(datediff(minute,convert(time,'09:35 AM'),
       convert(time,'07:06 PM'))/60 as varchar)
       +':'+cast(datediff(minute,convert(time,'09:35 AM'),
       convert(time,'07:06 PM'))%60 as varchar)
select cast(datediff(minute,convert(time,'09:35