Re: TIMESTAMP SUBTRACTION

Hi,

You could use something like this, although it might depend on how many
days you were expecting:

select substring((TO_TIMESTAMP('05-21-2003 00:40:00','mm-dd-yyyy')
-TO_TIMESTAMP('04-30-2003 00:00:00','mm-dd-yyyy'))::text from 0 for
3)::int as test;

Hope this helps,

Joe Healy

On Wed, 2003-05-21 at 20:57, Madhavi Daroor wrote:
> Hi All,
> When I subtract 2 timestamp variables in postgres 2.3.1, I get an
> interval value.
> Eg:
> SELECT TO_TIMESTAMP('05-21-2003 00:00:00','mm-dd-yyyy') -
> TO_TIMESTAMP('04-30-2003 00:00:00','mm-dd-yyyy');
> Result:
> 21 days --------- This is an interval
>
> But what I need is a numeric value. Ie; 21 and NOT 21 days.
>
> I need to compare this difference with a numeric value in my WHERE clause
> like this
>
> WHERE
> TIMESTAMP('05-21-2003 00:00:00','mm-dd-yyyy') - TO_TIMESTAMP('04-30-2003
> 00:00:00','mm-dd-yyyy') > 30
>
> But if I do this....I get wrong results. How do I do such a comparison? Or
> How to I get a Numeric value after the subtraction?
>
>
> Please reply SOON !!!
>
> Thanx,
> Madhavi Daroor
>
>
>
>
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