If you are looking for the latest created_at date, then you want to be grabbing
the max value of that field.
SELECT DISTINCT from_user_id, max(created_at) FROM messages WHERE to_user_id
= 1 GROUP BY from_user_id;
In your original query I think you meant to select from, not to, since to will
be 1;
----- Original Message -----
From: "John Kopanas" <[EMAIL PROTECTED]>
To: <mysql@lists.mysql.com>
Sent: Sunday, March 11, 2007 12:59 PM
Subject: Re: Finding a Solution To A Distinct Problem of Mine
I think I got it:
SELECT * FROM (SELECT * FROM messages ORDER BY created_at DESC) as
messages WHERE to_user_id = 1 GROUP BY from_user_id;
Is this the best way about it... or are their better ways you suggest?
On 3/11/07, John Kopanas <[EMAIL PROTECTED]> wrote:
I have the following table:
messages:
if:
from_user_id:
to_user_id:
body:
created_at:
updated_at:
I have to return all the rows that have a distinct from_user_id based
on a to_user_id. Not only that but I want to return the rows with the
newest created_at.
I thought this would work:
SELECT DISTINCT to_user_id, created_at FROM messages WHERE to_user_id
= 1 ORDER BY created_at;
But the problem is that I only get distincts when I only have
to_user_id in the SELECT clause. Any suggestions.
I need to return everything on the latest row that has a distinct
from_user_id :-).
--
John Kopanas
[EMAIL PROTECTED]
http://www.kopanas.com
http://www.cusec.net
http://www.soen.info
--
John Kopanas
[EMAIL PROTECTED]
http://www.kopanas.com
http://www.cusec.net
http://www.soen.info
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