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POHow to find Profit for Category
 

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  1. POHow to find Profit for Category
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    <p>My project is about a jewelery store and i try to find the profit of each product-category. Let me be more specific</p> <p>I have 3 tables which gives me the info: </p> <p>SALES(salesid,productid,quantity,price)</p> <pre><code>salesid productid Quantity Price 11001 13001 4 5 11002 13002 6 10 11003 13003 5 16 . . 11012 13012 7 15 </code></pre> <p>RETURN(salesid,productid,date,quantity,price)</p> <pre><code>salesid productid Quantity Price 11003 13003 1 16 11007 13007 3 12 11008 13008 3 8 </code></pre> <p>PROCUREMENT(procurementid,productid,quantity,price)</p> <pre><code>procurementid productid Quantity Price 100001 13001 10 2 100002 13002 10 2 . . 100012 13012 10 2 </code></pre> <p>product_category(categoryid,category)</p> <pre><code>categoryid category 1 Gold 2 Silver . 5 Platin </code></pre> <p>product(Productid,categoryid)</p> <pre><code>Productid categoryid 13001 1 13002 3 . . 13010 5 </code></pre> <p>The profit is given from this type: </p> <pre><code>Profit=Quantity*Price(Sell)-Quantity*Price(Return)-Quantity*Price(Procurement) </code></pre> <p>And now here is the problem.. I came up to this so far</p> <pre><code>SELECT categoryid, category, (coalesce(a.rev,0)- coalesce(b.ret,0), coalesce(c.cost,0)) AS profit FROM product category AS g JOIN product AS h ON g.categoryid = h.categoryid JOIN (SELECT categoryid, sum(quantity*price) AS rev FROM sales AS a, product AS b WHERE a.productid = b.productid GROUP BY categoryid) a LEFT OUTER JOIN (SELECT cartegoryid, sum(quantity*price) AS ret FROM RETURN AS a , product AS b WHERE a.productid = b.productid GROUP BY categoryid) b ON a.categoryid = b.categoryid LEFT OUTER JOIN (SELECT categoryid, sum(quantity*price) AS cost FROM procurement AS a, product AS b WHERE a.productid = b.productid GROUP BY categoryid) c ON a.categoryid = c.categoryid , product AS d, procurement AS e WHERE MONTH(f.date) = MONTH(e.date) AND YEAR(date) = 2013 </code></pre> <p>[sorry for the align i am new to the site dont know how to copy paste code well(:D)] wahtever when i do this it comes to a state like</p> <pre><code>categoryid category profit 1 Gold -100 2 Silver -100 . 5 Platin -100 </code></pre> <p>dont know where is the problem...i made a lot of changes and switches but nothing came up...any suggestion would be so helpfull.Thank u in advane</p>
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