From: John Fabiani <johnf@jfcomputer.com>
To: pgsql-sql@postgresql.org
Subject: Re: Dates and NULL's`
Date: Tue, 10 May 2011 10:24:23 -0700
Message-ID: <201105101024.23612.johnf@jfcomputer.com> (raw)
In-Reply-To: <BANLkTina8jK3f_p0xynxgzQhpL2aCUsL6A@mail.gmail.com>
References: <201105100948.41392.johnf@jfcomputer.com>
<BANLkTina8jK3f_p0xynxgzQhpL2aCUsL6A@mail.gmail.com>
On Tuesday, May 10, 2011 10:16:21 am Richard Broersma wrote:
> On Tue, May 10, 2011 at 9:48 AM, John Fabiani <johnf@jfcomputer.com> wrote:
> > Where mydate >= "2011/04/01"::date and mydate<= "2011/04/30"::date
> > With the above where will the NULL's be selected????
>
> Here is what I get when I try:
>
> spi=> SELECT NULL::DATE >= '2011-04-01'::DATE AND NULL::DATE <=
> '2011-04-30'::DATE;
> ?column?
> ----------
>
> (1 row)
>
>
> spi=> SELECT (NULL::DATE >= '2011-04-01'::DATE AND NULL::DATE <=
> '2011-04-30'::DATE) IS TRUE;
> ?column?
> ----------
> f
> (1 row)
>
>
> spi=> SELECT (NULL::DATE >= '2011-04-01'::DATE AND NULL::DATE <=
> '2011-04-30'::DATE) IS FALSE;
> ?column?
> ----------
> f
> (1 row)
>
>
> spi=> SELECT (NULL::DATE >= '2011-04-01'::DATE AND NULL::DATE <=
> '2011-04-30'::DATE) IS UNKNOWN;
> ?column?
> ----------
> t
> (1 row)
Sorry Richard, I do not understand.
It looks like you are saying the NULLS will be returned too
Johnf
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To: pgsql-sql@postgresql.org
Cc: johnf@jfcomputer.com
Subject: Re: Dates and NULL's`
In-Reply-To: <201105101024.23612.johnf@jfcomputer.com>
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