What's wrong with this SQL query?

Posted by ThinkingInBits on Stack Overflow See other posts from Stack Overflow or by ThinkingInBits
Published on 2010-05-18T05:58:09Z Indexed on 2010/05/18 6:00 UTC
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mysql

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php

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query

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database

I have two tables: photographs, and photograph_tags. Photograph_tags contains a column called photograph_id (id in photographs). You can have many tags for one photograph. I have a photograph row related to three tags: boy, stream, and water. However, running the following query returns 0 rows

SELECT p.* FROM photographs p, photograph_tags c WHERE c.photograph_id = p.id AND (c.value IN ('dog', 'water', 'stream')) GROUP BY p.id HAVING COUNT( p.id )=3

Is something wrong with this query?

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