From: Peter Brawley
Date: June 19 2006 4:17pm
Subject: Re: Find rows in table A where table B = 'hello' AND table B = 'world'
List-Archive: http://lists.mysql.com/mysql/199044
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David,

>How do I find all the tags that are tagged with the 
>words "mysql" AND "databases" AND "tutorial"?

If there are no url-keyword dupes in tbl_url_keyword ...

SELECT u.urlid, u.url
FROM tbl_url_keyword AS uk
INNER JOIN tbl_url AS u USING (urlid)
INNER JOIN tbl_keywords AS k USING (keywordid)
WHERE k.keyword IN('mysql','databases','tutorials')
GROUP BY u.urlid
HAVING COUNT(*) = 3;

PB

-----

David Otton wrote:
> That's a lousy subject line, but I don't know how to describe this problem. I've been banging my head against this for a couple of days, and I'm certain there's a simple solution I'm missing.
>
> I've got a URL table, a keyword table, and a joining table, so each URL has a list of keywords applied to it, and each keyword can be applied to many URLs:
>
> tbl_url
> -------
>
> INT urlid,
> VARCHAR url
>
> tbl_keyword
> -----------
>
> INT keywordid,
> VARCHAR keyword
>
> tbl_url_keyword
> ---------------
>
> INT urlid,
> INT keywordid
>
> How do I find all the tags that are tagged with the words "mysql" AND "databases" AND "tutorial"?
>
> It seems so simple, I can't believe it's caused me so much grief.
>
>
>
>   


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