Convert time to millisec?

On Mon, Aug 28, 2006 at 10:48:47AM +0200, Bj�rn T Johansen wrote:

select sum(Til - Fra) as total from Log_stop where OrdreID = 3434

but I would like the result to be in milliseconds, is this possible? If so, how?
(the fields Til and Fra is of type Time)

You could use extract(epoch from <interval>) to get the number of
seconds (with fractional part) in an interval, then multiply by
1000 to get milliseconds. Example:

select extract(epoch from sum(Til - Fra)) * 1000.0 ...

--
Michael Fuhr

On Mon, 28 Aug 2006 07:20:02 -0600
Michael Fuhr <mike@fuhr.org> wrote:

On Mon, Aug 28, 2006 at 10:48:47AM +0200, Bjørn T Johansen wrote:

select sum(Til - Fra) as total from Log_stop where OrdreID = 3434

but I would like the result to be in milliseconds, is this possible? If so, how?
(the fields Til and Fra is of type Time)

You could use extract(epoch from <interval>) to get the number of
seconds (with fractional part) in an interval, then multiply by
1000 to get milliseconds. Example:

select extract(epoch from sum(Til - Fra)) * 1000.0 ...

That did the trick... Thx... :)

Do you know if this is supported on older versions of PostgreSQL as well? (eg. 7.4.x)

BTJ

On Mon, Aug 28, 2006 at 04:18:12PM +0200, Bj�rn T Johansen wrote:

On Mon, 28 Aug 2006 07:20:02 -0600 Michael Fuhr <mike@fuhr.org> wrote:

select extract(epoch from sum(Til - Fra)) * 1000.0 ...

Do you know if this is supported on older versions of PostgreSQL
as well? (eg. 7.4.x)

Yes, it is; I think it's worked since ancient times. See "Date/Time
Functions and Operators" in the "Functions and Operators" chapter
of the documentation for whatever versions you need. Here's a link
for 7.4:

http://www.postgresql.org/docs/7.4/interactive/functions-datetime.html

--
Michael Fuhr