From: Edmund Bacon <ebacon@onesystem.com>
To: pgsql-sql@postgresql.org
Cc: ogjunk-pgjedan@yahoo.com
Subject: Re: Order by YYYY MM DD in reverse chrono order trouble
Date: Wed, 21 Apr 2004 08:52:20 -0600
Message-ID: <40868AA4.2070501@onesystem.com> (raw)
In-Reply-To: <20040421103003.79774.qmail@web12703.mail.yahoo.com>
References: <20040421103003.79774.qmail@web12703.mail.yahoo.com>
Is there some reason you can't do this:
SELECT DISTINCT
date_part('year', uu.add_date), date_part('month', uu.add_date),
date_part('day', uu.add_date)
FROM uus INNER JOIN ui ON uus.user_id=ui.id INNER JOIN uu ON
ui.id=uu.user_id
WHERE uus.x_id=1
ORDER BY
uu.add_date DESC;
This might be faster, as you only have to sort on one field, and I think it should give the desired results
ogjunk-pgjedan@yahoo.com wrote:
>Hello,
>
>I am trying to select distinct dates and order them in the reverse
>chronological order. Although the column type is TIMESTAMP, in this
>case I want only YYYY, MM, and DD back.
>
>I am using the following query, but it's not returning dates back in
>the reverse chronological order:
>
>SELECT DISTINCT
> date_part('year', uu.add_date), date_part('month', uu.add_date),
> date_part('day', uu.add_date)
>
>FROM uus INNER JOIN ui ON uus.user_id=ui.id INNER JOIN uu ON
>ui.id=uu.user_id
>WHERE uus.x_id=1
>
>ORDER BY
>date_part('year', uu.add_date), date_part('month', uu.add_date),
>date_part('day', uu.add_date) DESC;
>
>
>This is what the above query returns:
>
> date_part | date_part | date_part
>-----------+-----------+-----------
> 2004 | 2 | 6
> 2004 | 4 | 20
>(2 rows)
>
>
>I am trying to get back something like this:
>2004 4 20
>2004 4 19
>2004 2 6
>...
>
>My query is obviously wrong, but I can't see the mistake. I was
>wondering if anyone else can see it. Just changing DESC to ASC, did
>not work.
>
>Thank you!
>Otis
>
>
>---------------------------(end of broadcast)---------------------------
>TIP 2: you can get off all lists at once with the unregister command
> (send "unregister YourEmailAddressHere" to majordomo@postgresql.org)
>
>
--
Edmund Bacon <ebacon@onesystem.com>
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: ebacon@onesystem.com, ogjunk-pgjedan@yahoo.com
Subject: Re: Order by YYYY MM DD in reverse chrono order trouble
In-Reply-To: <40868AA4.2070501@onesystem.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox