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POSummary of a share percentage calculation from two tables
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2013-02-21T04:03:08.723
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I want to return the result of summary of a share percentage calculation from two tables but I have no idea on how to do this. My table is as follows: table pa <pre><code>---+-----------+---------+-----------+---------+-----------+---------+----------+ id | product_1 | share_1 | product_2 | share_2 | product_3 | share_3 | amount | ---+-----------+---------+-----------+---------+-----------+---------+----------+ 1 | 3 | 50 | 2 | 50 | | | 5000 | 2 | 2 | 50 | 1 | 25 | 4 | 25 | 10000 | 3 | 5 | 50 | 4 | 50 | | | 7000 | ---+-----------+---------+-----------+---------+-----------+---------+----------+ </code></pre> table products <pre><code>---+-----------+ id | name | ---+-----------+ 1 | Book | 2 | Pen | 3 | Ruler | 4 | Pencil | 5 | Calendar | ---+-----------+ </code></pre> I want the result to came out like this: <pre><code>Product_name | Total -------------+---------- Book | 2500 Pen | 7500 Ruler | 2500 Pencil | 6000 Calendar | 3500 -------------+---------- Grand Total | 22000 </code></pre> As far, I've tried this query <pre><code>$this->db->select('t1.name as product_name, sum(t2.amount) as total'); $this->db->from('products t1'); $this->db->join('pa t2', 't2.product_1 = t1.id OR t2.product_2 = t1.id OR t2.product_3 = t1.id', 'left'); $this->db->group_by('t1.name'); $query = $this->db->get(); </code></pre> SQL Fiddle: <a href="http://sqlfiddle.com/#!2/471c4/1" rel="nofollow">http://sqlfiddle.com/#!2/471c4/1</a> But it not returning the result I want since there's no calculation for the share percentage for each product. Is there any way to return the result I want with only SQL query? Or do I have to do the calculation recursively with PHP?
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<mysql><codeigniter><activerecord>
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Summary of a share percentage calculation from two tables
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