How to design a MySql Table for a Tag Cloud?

Question

I have articles on my site, and I would like to add tags which would describe each article, but I\'m having problems with design mysql table for tags. I have two ideas:

Answer 1

First off, you'll want to use Pascal MARTIN's suggestion about the table design.

As for finding similar articles, here's something to get you started. Given that @article_id is the article you want to find matches for, and @tag1, @tag2, @tag3 are the tags for that article:

SELECT article_id, count(*)
FROM tags_articles
WHERE article_id <> @article_id
AND tag_id IN (@tag1, @tag2, @tag3)
GROUP BY article_id
ORDER BY count(*) DESC
LIMIT 3