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POSQL LEFT JOIN not working properly
 

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    <p>I'm having trouble getting the result out of my query. I want to fetch the sum and total count of an unit sale in transactions, where the transaction is in a specific zip.</p> <p>Here are my tables: </p> <pre><code>TABLE unit_type( id (Primary key) unit_name (varchar) department_id (Foreign key) ) TABLE transaction( id (PK) commission_fix_out (int) transaction_end_week (int) property_id (FK) unit_type_id (FK) ... ) TABLE property( id (PK) property_zip_id (FK) ... ) </code></pre> <p>My <strong>unit_types</strong> table has the following records:</p> <pre><code>+-----+----------------------+----------------+ | id | unit_name | department_id | +-----+----------------------+----------------+ | 1 | WV construction | 1 | | 2 | WV resale | 1 | | 3 | WV rent | 1 | | 4 | BV industrial sale | 2 | | 5 | BV industrial rent | 2 | | ... | ... | ... | +-----+----------------------+----------------+ </code></pre> <p>Here's how my query looks like:</p> <pre><code>SELECT SUM(commission_fix_out), COUNT(commission_fix_out), unit_name, ut.id FROM unit_type as ut LEFT JOIN transaction as t ON ut.id = t.unit_type_id RIGHT JOIN property as p ON (p.id = t.property_id AND p.property_zip_id = 1459) WHERE ut.department_id = 1 GROUP BY unit_name ORDER BY ut.id </code></pre> <p>which results in:</p> <pre><code>+------------+-------------+-------------+---------+ | SUM(...) | COUNT(..) | unit_name | ut.id | +------------+-------------+-------------+---------+ | 40014 | 11 | WV resale | 2 | | NULL | 0 | WV rent | 3 | +------------+-------------+-------------+---------+ </code></pre> <p>I was expecting another row with <strong>WV construction</strong>, but it doesn't show up. Anyone who knows where i am wrong with this one?</p>
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    1. USJ. Ghyllebert
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    1. COcheck this http://phpweby.com/tutorials/mysql/32, it may help with LEFT / RIGHT join
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      1. USbpgergo
 

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