Re: Sum(time) possible?

On Sat, 3 Nov 2001, Konstantinos Agouros wrote:
>On Sat, Nov 03, 2001 at 09:33:35AM -0800, Andrew Gould wrote:
>>Are you trying to sum times or lengths of time?
>Yup. A little background the column hold the time someone works on a project.
>At the end of the month I want to see the total time. If time is not the right
>column type for this please let me know.

Sounds like you want an interval data type, not time. Interval describes a
discrete length of time in temporal units, and you can perform a sum() on
its values.

You could possibly instead have a start_timestamp column and an
end_timestamp column, and do a sum(end_timestamp - start_timetstamp), if
you need to track more than just the interval; subtracting a timestamp
from another timestamp will yield an interval.


Regards,
Jw.
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