postgresql 7.1 select i.product_id, i.color_choice, i.size_choice, i.style_choice, count(*) as item_count, u.offer_code from ec_products p, ec_items i left join ec_user_session_offer_codes u on (u.product_id = i.product_id and u.user_session_id = :user_session_id) where i.product_id = p.product_id and p.no_shipping_avail_p = 'f' and i.order_id = :order_id group by i.product_id, i.color_choice, i.size_choice, i.style_choice, u.offer_code