В общем фильтровать по 1 атрибуту получается просто, запрос выглядит так:
SELECT p.product_id,p2a.text,p2a.attribute_id, (SELECT AVG(rating) AS total FROM review r1 WHERE r1.product_id = p.product_id AND r1.status = '1' GROUP BY r1.product_id) AS rating FROM product p LEFT JOIN product_description pd ON (p.product_id = pd.product_id) LEFT JOIN product_to_store p2s ON (p.product_id = p2s.product_id) LEFT JOIN product_attribute p2a ON (p.product_id = p2a.product_id) LEFT JOIN product_to_category p2c ON (p.product_id = p2c.product_id) WHERE pd.language_id = '1' AND p.status = '1' AND p.date_available <= NOW() AND p2s.store_id = '0' AND p2c.category_id = '57' and ( attribute_id='12' and text='7\'\'' )
Но не получается по двум и более отфильтровать....