On Mon, 19 Feb 2001, Raghunath T wrote:
> Hi ,
> Please consider the following schema and the query given below and
> let me know how to get the results I want.
>
> CREATE TABLE temp (
> id INTEGER NOT NULL,
> start_time TIMESTAMP,
> end_time TIMESTAMP,
> PRIMARY KEY (id)
> );
>
> Now I want the difference between start time and end time in seconds.
> Select date_part('seconds',start_time - end_time) from temp; gives
> me only the difference between the seconds value in both timestamps. It
> ignores all the days, hrs, minutes etc.
>
> My problem is that I want the actual difference between the two timestamps
> expressed in seconds.
You should be able to get that with date_part('epoch', start_time-end_time)
(or more likely end_time-start_time unless you want a negative number)