How to convert raw PHP Join Query into Magento Join Query

Question

How to convert raw php LEFT JOIN query in to magento query? What is Magentos syntax for?

Here is my query:

SELECT fieldsmanager_orders.value,sales_flat_order_address.entity_id
FROM fieldsmanager_orders
LEFT JOIN sales_flat_order_address ON fieldsmanager_orders.entity_id = sales_flat_order_address.entity_id;

Answer 1

You can call your parent collection model like

$collection = Mage::getModel('fieldsmanager/orders')->getCollection();

Note: Make sure your namespace/entity is correct.

Then from the main collection you can join the sales_flat_order_address table.

$collection->getSelect()->joinLeft(
    array('sales_flat_order_address'=>$collection->getTable('sales/order_address')),
    'main_table.entity_id=sales_flat_order_address.entity_id,
    array('*')
);

Parameters description

Here in first parameter you pass the table you want to join with.You can use an array of the format array('alias' => 'namespace/entity')

In second parameter you add your condition to join with.

and in third one you pass the columns you want from join. "*" resembles for all columns. If you want specific column you can pass in that array.