how to just get time from a date

hello

I am just trying to get a time from the query I have and its giving me the default date then my time. The time is the only part that I need in that field.

What i get 
1900-01-01 00:00:55.000

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what i need
00:00:55

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my SQL 
 select  datediff(hour, 0, cast(CallTime as time)),
  DATEADD(ms, SUM(DATEDIFF(ms, '00:00:00.000',  convert(varchar(10), dateadd(second, Duration, 0), 108))), '00:00:00.000') as time
  from NT_API_CallLogs
 WHERE Duration <> 0
 AND cast(CallTime as date) = '2017-3-08'
GROUP BY datediff(hour, 0, cast(CallTime as time) )
ORDER BY datediff(hour, 0, cast(CallTime as time) )

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LVL 1
Chris JonesLead Application Web DeveloperAsked:
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Kent OlsenDBACommented:
cast the result of the call to datediff as a Time value, not the parameter that you're passing.
Chris JonesLead Application Web DeveloperAuthor Commented:
but this line is the line I need in just hours minutes sand seconds call time returns the correct result i need

this is the line i need to remove the default date from.
  DATEADD(ms, SUM(DATEDIFF(ms, '00:00:00.000',  convert(varchar(10), dateadd(second, Duration, 0), 108))), '00:00:00.000') as time

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Scott PletcherSenior DBACommented:
I think you can just do this and get the desired result, if I'm reading the code correctly:

Select  datediff(hour, 0, cast(CallTime as time)),
  CAST(DATEADD(SECOND, SUM(Duration), 0) AS time) AS time
  from NT_API_CallLogs
 WHERE Duration <> 0
 AND cast(CallTime as date) = '2017-3-08'
GROUP BY datediff(hour, 0, cast(CallTime as time) )
ORDER BY datediff(hour, 0, cast(CallTime as time) )

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Chris JonesLead Application Web DeveloperAuthor Commented:
AWESOME Scott - am i able to remove the trailing 0's i was thinking to substring it maybe.
Scott PletcherSenior DBACommented:
If you just want HH:MM, you can do this:

CONVERT(varchar(5), CAST(DATEADD(SECOND, SUM(Duration), 0) AS time), 8) AS time

If you want HH:MM:SS, change to "varchar(8)".
Chris JonesLead Application Web DeveloperAuthor Commented:
Thanks this worked great
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