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POHow can I create a MySQL JOIN query for only selecting the rows in one table where a certain number of references to that row exist in another table?
 

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  1. POHow can I create a MySQL JOIN query for only selecting the rows in one table where a certain number of references to that row exist in another table?
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    <p>I have two tables in my database, called <em>ratings</em> and <em>movies</em>.</p> <p><strong>Ratings:</strong></p> <blockquote> <p><code>| id | movie_id | rating |</code></p> </blockquote> <p><strong>Movies:</strong></p> <blockquote> <p><code>| id | title |</code></p> </blockquote> <p>A typical movie record might be like this:</p> <blockquote> <p><code>| 4 | Cloverfield (2008) |</code></p> </blockquote> <p>and there may be several rating records for Cloverfield, like this:</p> <blockquote> <p><code>| 21 | 4 | 3 |</code> (rating number 21, on movie number 4, giving it a rating of 3)</p> <p><code>| 22 | 4 | 2 |</code> (rating number 22, on movie number 4, giving it a rating of 2)</p> <p><code>| 23 | 4 | 5 |</code> (rating number 23k on movie number 4, giving it a rating of 5)</p> </blockquote> <p><strong>The question:</strong></p> <p>How do I create a JOIN query for only selecting the rows in the movie table that have more than <code>x</code> number of ratings in the ratings table? For example, in the above example if Cloverfield only had one rating in the ratings table and <code>x</code> was 2, it would not be selected.</p> <p>Thanks for any help or advice!</p>
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