Alterar valor de atributo para todos os produtos no Magento Change attribute value for all products in Magento

product_attributes

<?php
//get all products
$products = Mage::getResourceModel('catalog/product_collection')->getAllIds();

//Now create an array of attribute_code => values
$attributesData = array(
						array('orig' => 1),
						array('ncm' => 33030020),
						array('ucom' => 'un'),
						array('subst' => 1)
						);
//Set the store to affect. I used admin to change all default values
$storeId = 0; //A.K.A Admin
//Now Update the attribute(s) for the given products.
foreach ($attributesData as $attributeData) {
	Mage::getSingleton('catalog/product_action')->updateAttributes($products, $attributeData, $storeId);
}