Hi,

I'm trying to get extract() to always return the number of hours between two time intervals, ala:

=> create table t1(timestart timestamp, timeend timestamp);
=> insert into t1(timestart, timeend) values ('2010-01-01 00:00:00', '2010-01-02 01:00:00');

=> select timeend - timestart from t1;
    ?column?
----------------
 1 day 01:00:00
(1 row)

to return 25 hours.

I couldn't see anything in the docs and can't work out a way to do it.

Any suggestions?

Thanks!
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