How to get the total time of the records in a table

Hello,

I have one table that has a column called CallDuration. This columns has always the format "1/01/2000 12:01:38 AM". The date part "1/01/2000" I want to discard, and sum the time part to get a total time in my query. How can I do that?

Thxselect datediff(hour,'1/01/2000 12:01:38 AM', '1/01/2000 11:10:38 AM') Hours,
datediff(minute,'1/01/2000 12:01:38 AM', '1/01/2000 11:10:38 AM') % 60 Minutes,
datediff(minute,'1/01/2000 12:01:38 AM', '1/01/2000 11:10:38 AM') TotalMinutes|||select datediff(hour,min(callduration), max(callduration)) Hours,
datediff(minute,min(callduration), max(callduration)) % 60 Minutes,
datediff(minute,min(callduration), max(callduration)) TotalMinutes