Re: Number of months

From: Franco Bruno Borghesi <franco(at)akyasociados(dot)com(dot)ar>
To: Patrick Hatcher <PHatcher(at)macys(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Number of months
Date: 2004-11-03 20:08:51
Message-ID: 1099512531.40491.7.camel@taz.oficina
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You could create your own function for the conversion, something like:

CREATE OR REPLACE FUNCTION interval2Months(INTERVAL) RETURNS INTEGER
LANGUAGE 'sql' IMMUTABLE AS '
SELECT CAST(extract(YEAR FROM $1) * 12 + extract (MONTH FROM $1) AS
INTEGER);
';

you call it doing SELECT interval2Months(age('2003-01-01'::date));

Of course, you can create a function that obtains the age directly from
a DATE parameter and then converts that value to months.

Hope it helps.

On Wed, 2004-11-03 at 15:52, Patrick Hatcher wrote:

> Is there a function that will give me the number of months, as an
> integer, in Pg 7.4.x? I found the date_trunc function but that will
> return text and I didn't see anything else?
>
> I have this, but didn't want to duplicate the work if it wasn't
> necessary:
>
> (date_part('Year', CURRENT_DATE) -date_part('Year', SOMEDATE)) * 12
> +date_part('Month', CURRENT_DATE)-date_part('Month',SOMEDATE)
>
> TIA
>
> Patrick Hatcher
>
>

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