Magento: Adding OR and AND query condition to collection

Here is a quick tip to add OR query and AND query to collection object. I am implementing this on product collection.

Getting product collection

// PRODUCT COLLECTION
$collection = Mage::getModel('catalog/product')->getCollection();

Adding AND query condition

Filtering collection to select only those products whose sku is like ‘ch’ AND status is equal to 1 (i.e. enabled status).

// AND QUERY
$collection->addAttributeToFilter('sku', array('like' => '%ch%'));
$collection->addAttributeToFilter('status', array('eq' => '1'));

Adding OR query condition for addAttributeToFilter

Filtering collection to select only those products whose sku is like ‘ch’ OR status is equal to 1 (i.e. enabled status).

// OR QUERY
$collection->addAttributeToFilter(array(
				array(
					'attribute' => 'sku',
					'like' => '%ch%'),
				array(
					'attribute' => 'status',
					'eq' => '1')
			));

Adding OR query condition for addFieldToFilter

// Adding OR condition to the query
$collection->addFieldToFilter(
    array('sku', 'id'), // columns/field of database table
    array( // conditions
        array( // conditions for 'sku' (first field)
            array('in' => array('text_1', 'text_2', 'text_3')),
            array('like' => '%text')
        ),
        array('gt' => 5) // condition for 'id' (second field)
    )
);

You may check the query statement with the following code

echo $collection->printLogQuery(true);

OR, with the following code:

echo $collection->getSelect();

Thanks.