Question

So I have a table full of tag keywords.

Tags
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asp
sql
html

and a table full of posts

posts
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This post contains SQL

I want to display the top 10 tags in order of most unique posts containing occurrences in the posts table.

This is what I have but it is rubbish, I am ashamed.

SELECT Tag,(SELECT Count(*) FROM Posts WHERE post LIKE '%Tags.Tag%') As Mentions FROM Tags ORDER BY Mentions DESC

Please help! I know there is some sort of mystical UNION or GROUP BY I am missing here.

Answer 1

SELECT TOP 10 *
FROM (
    SELECT tag,COUNT(tag) AS Total
    FROM tags t
    JOIN posts p ON p.post LIKE '%' + t.tag + '%'
    GROUP BY tags
) totals
ORDER BY Total Desc