From: Daevid Vincent
Date: May 20 2012 12:09am
Subject: RE: SQL query help. Retrieve all DVDs that have at least one scene of a certain encoding format
List-Archive: http://lists.mysql.com/mysql/227462
Message-Id: <002a01cd361c$c29548c0$47bfda40$@daevid.com>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit

There are a bunch of other columns in all these tables. A quick reason is
need the dvd.title too therefore the dvd table is needed. Another reason is
that the query is generated programmatically based upon parameters passed to
a method. But yes, I do she your point and maybe I can refactor some things
in this special case.

I haven't tried your query as I'm home and not at work right ATM, but I
think you need a DISTINCT dvd_id right? Otherwise I'll get a bunch of rows
all with the same dvd_id since multiple scene_ids will match.

d

-----Original Message-----
From: Mark Kelly [mailto:mysql@stripped] 
Sent: Saturday, May 19, 2012 3:34 PM
To: mysql@stripped
Subject: Re: SQL query help. Retrieve all DVDs that have at least one scene
of a certain encoding format

Hi.

On Friday 18 May 2012 18:21:07 Daevid Vincent wrote:

> Actually, I may have figured it out. Is there a better way to do this?

I don't see why you need the dvds table when the dvd_id is in the scene
table:

SELECT a.dvd_id 
FROM scenes_list a, moviefiles b 
WHERE a.scene_id = b.scene_id 
AND b.format_id = '13';

or am I misunderstanding something?

Cheers,

Mark


-- 
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe:    http://lists.mysql.com/mysql