Re: convert sum (interval) to seconds

On Tue, 2002-09-03 at 11:45, Doppelganger wrote:
> How can I convert sum(interval) to seconds?
...
> If I say, 
> select sum(interval) from tablename where login='john';
> it will give me 00:45:28 (That's 45 mins, and 28 secs).
> How can I convert that to seconds? Can I possibly do it
> in just one query? Thank you

Here's one way; I'm not sure if there may not be something more
efficient, though:
   junk=# select sum(if) from i;      sum       ----------    00:45:28   (1 row)      junk=# select extract (minute
fromsum(if)) * 60 + extract (second   from sum(if)) from i;    ?column?    ----------        2728   (1 row)
 

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight, UK                            
http://www.lfix.co.uk/oliver
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