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 from sum(if)) * 60 + extract (second
from sum(if)) from i;
?column?
----------
2728
(1 row)

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Oliver Elphick Oliver(dot)Elphick(at)lfix(dot)co(dot)uk
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Consider the ravens, for they neither sow nor reap;
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Consider the lilies, how they grow; they toil
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how much more will he clothe you, O ye of little
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Luke 12:22-24; 27-29; 31.