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POTrouble using MySQL JOINS
 

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  1. POTrouble using MySQL JOINS
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    <p>I'm getting info of sales by date with this code:</p> <pre><code>SELECT product.product_id, product.product_brand_id, product.product_model_id, product.product_subcategory_id, product.product_retail_price, product.product_wholesale_price, SUM(product_sold.product_quantity) AS product_quantity_sold, SUM(product_sold.product_total_price) AS total_price_sold FROM product INNER JOIN product_sold ON product.product_id = product_sold.product_id AND product.product_subcategory_id = '$subcategory_id' INNER JOIN sales ON sales.sales_id = product_sold.product_sales_id WHERE sales.sales_approved = '1' AND sales.sales_approved_time &gt; '$start_timestamp' AND sales.sales_approved_time &lt; '$end_timestamp' GROUP BY product.product_id ORDER BY SUM(product_sold.product_quantity) DESC </code></pre> <p>This above code is pulling the info correctly, but when I tried to get info of product sold and also unsold I run this code:</p> <pre><code>SELECT product.product_id, product.product_brand_id, product.product_model_id, product.product_subcategory_id, product.product_retail_price, product.product_wholesale_price, SUM(product_sold.product_quantity) AS product_quantity_sold, SUM(product_sold.product_total_price) AS total_price_sold, product_brand.brand_name, product_model.model_name, product_subcategory.subcategory_name FROM product LEFT JOIN product_sold ON product.product_id = product_sold.product_id AND product.product_subcategory_id = '$subcategory_id' LEFT JOIN sales ON sales.sales_id = product_sold.product_sales_id AND sales.sales_approved = '1' AND sales.sales_approved_time &gt; '$start_timestamp' AND sales.sales_approved_time &lt; '$end_timestamp' INNER JOIN product_brand ON product_brand.brand_id = product.product_brand_id INNER JOIN product_model ON product_model.model_id = product.product_model_id INNER JOIN product_subcategory ON product_subcategory.subcategory_id = product.product_subcategory_id WHERE product.product_subcategory_id = '$subcategory_id' GROUP BY product.product_id ORDER BY SUM(product_sold.product_quantity) DESC, product_brand.brand_name ASC, product_model.model_name ASC </code></pre> <p>When I run that code works but not by date, it takes all the data from the database and show the info.</p> <p>What I need is show products that have been sold and then add a kind of subquery to also show products that haven't been sold.</p> <hr> <p>THE FINAL SOLUTION I FOUND IS THIS.</p> <pre><code>SELECT p.product_id, p.product_brand_id, p.product_model_id, p.product_subcategory_id, p.product_retail_price, p.product_wholesale_price, SUM(IFNULL(ps.product_quantity,0)) AS product_quantity_sold,SUM(IFNULL(ps.product_total_price,0)) AS total_price_sold, pb.brand_name, pm.model_name, psub.subcategory_name FROM product p LEFT JOIN product_sold ps ON p.product_id = ps.product_id LEFT JOIN sales s ON ps.product_sales_id = s.sales_id JOIN product_brand pb ON pb.brand_id = p.product_brand_id JOIN product_model pm ON pm.model_id = p.product_model_id JOIN product_subcategory psub ON psub.subcategory_id = p.product_subcategory_id WHERE p.product_subcategory_id = $subcategory_id AND ( s.sales_id IS NULL OR ( s.sales_approved = '1' AND s.sales_approved_time &gt; '$start_timestamp' AND s.sales_approved_time &lt; '$end_timestamp' ) ) GROUP BY p.product_id ORDER BY product_quantity_sold DESC, pb.brand_name ASC, pm.model_name ASC </code></pre>
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