How to split the total time with condition

Using SQL Server.

Table1

ID TotalTime

001 12:00:00
002 11:00:00
003 09:00:00
004 08:00:00
005 14:00:00
....
....,

TotalTime Datatype is nvarchar

I need to split the total time column in to 3 columns like the below condition

First 8 Hours should display in  First column
After 8 Hours the next 2 Hours should display in Second column
After 10 Hours the remaining hours should display in third column

Expected Output

ID TotalTime Column1 Column2 Column3

001 12:00:00 08:00:00 02:00:00 02:00:00
002 11:00:00 08:00:00 02:00:00 01:00:00
003 09:00:00 08:00:00 01:00:00 
004 08:00:00 08:00:00      
005 14:00:00 08:00:00 02:00:00 04:00:00
..开发者_StackOverflow社区..
....,

How to make a query for the above condition.

Need Query Help.

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You could use a case to split up the time:

select  ID
,       case when totaltime > 8 then 8 
             else totaltime end
,       case when totaltime > 10 then 2
             when totaltime > 8 then totaltime - 8
             else 0 end
,       case when totaltime > 10 then totaltime - 10
             else 0 end
from    YourTable