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    <p>UPDATE TO ANSWER NOW THAT DATA SAMPLES ARE AVAILABLE</p> <p>Still assuming it's Microsoft SQL Server, this query produces the following result</p> <pre><code>SELECT c.category_id, minDateExpires.Expiring FROM category c LEFT JOIN product_to_category p2c ON (c.category_id = p2c.category_id) LEFT JOIN product p ON (p2c.product_id = p.product_id) LEFT JOIN ( SELECT MIN(date_expires) AS expiring, Product_ID FROM product WHERE date_expires &gt;= GETDATE() GROUP BY Product_ID ) minDateExpires on p.product_id = minDateExpires.product_id ORDER BY expiring </code></pre> <p>Results:</p> <pre><code>category_id Expiring 63 NULL 63 NULL 62 NULL 64 NULL 63 2012-07-16 14:12:00.000 63 2012-07-18 08:15:00.000 62 2012-07-26 15:01:00.000 63 2012-08-02 13:04:00.000 63 2012-08-24 00:00:00.000 </code></pre> <p>The null columns are there because there is no min date for those product id's >= the current date/time. Are you actually after the minimum date time grouped by categoryid, not product id? In which case your query could be something like:</p> <pre><code>SELECT c.category_id, minDateExpires.Expiring FROM @category c LEFT JOIN @product_to_category p2c ON (c.category_id = p2c.category_id) LEFT JOIN @product p ON (p2c.product_id = p.product_id) LEFT JOIN ( SELECT MIN(date_expires) AS expiring, Category_ID FROM @product p join @product_to_category p2c on p2c.product_id = p.product_id WHERE date_expires &gt;= GETDATE() GROUP BY Category_id ) minDateExpires on p2c.category_id = minDateExpires.category_id ORDER BY expiring </code></pre> <p>which gives you</p> <pre><code>64 NULL 63 2012-07-16 14:12:00.000 63 2012-07-16 14:12:00.000 63 2012-07-16 14:12:00.000 63 2012-07-16 14:12:00.000 63 2012-07-16 14:12:00.000 63 2012-07-16 14:12:00.000 62 2012-07-26 15:01:00.000 62 2012-07-26 15:01:00.000 </code></pre>
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    1. POComplex Sort Function using Join, SQL, Order Categories by Products' expiry, Opencart
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    1. COWow this is impressive stuff thanks. There is an extra bracket going on in the subquery though and this is way too far over my head.
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    2. COSorry, forgot to take out the last bracket there. Updating now
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    3. COHmm it's still not bringing results for me. I tried changing the first 'minDateExpires.Expiring' to 'minDateExpires.expiring' and then I also tried changing 'ORDER BY minDateExpires.expiring' and neither worked...
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