Re: Order by YYYY MM DD in reverse chrono order trouble

Hi,

If you want to SORT descending considering multiple column, you need to
spefify DESC after each column.

Default is ASC.

So, your present sorting is ASC, ASC and DESC

You can specify
1 DESC, 2 DESC, 3 DESC

HTH

Denis


----- Original Message -----
From: <ogjunk-pgjedan@yahoo.com>
To: <pgsql-sql@postgresql.org>
Sent: Wednesday, April 21, 2004 4:00 PM
Subject: [SQL] Order by YYYY MM DD in reverse chrono order trouble


> 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
>
>
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