How about:
select userID,
sum((abstime(endTimeStamp)-abstime(startTimeStamp))::numeric)/3600 as
totalhours from yourLogTable group by userID;
Cheers,
Steve
On Monday 09 December 2002 4:00 pm, Ron St.Pierre wrote:
> Hi, I've got another question about time - timestamps. I need to
> summarize the amount of time a user has used the system for from a table
> listing the userID, startTimestamp, endTimestamp.
> id userID startTimestamp endTimestamp
> 1 2119 5/10/00 7:32:33 PM 5/10/00 7:33:59 PM
> 2 2119 5/10/00 7:36:30 PM 5/10/00 7:39:27 PM
> 3 2119 5/10/00 7:40:01 PM 5/10/00 9:40:05 PM
> 4 2120 5/10/00 8:11:12 PM 5/10/00 8:11:21 PM
> 5 2121 5/10/00 8:12:26 PM 5/10/00 8:12:46 PM
>
> I don't want to use the interval functions as I don't want the results
> summarized by total months, weeks, days, years, hours, minutes,
> seconds...., I just want the total hours eg 47.98 HOURS
> I couldn't find any suitable way of doing it in the manual or in
> techdocs(.postgresq.org).
>
> Anyone have any suggestions?
> Thanks