select replace(p.product_name,'"') product , to_char(o.order_timestamp, 'YYYY')||'W'||to_char(o.order_timestamp, 'iW') quarter , i.unit_price * i.quantity unitprice , p.category from demo_order_items i , demo_orders o , demo_product_info p where i.order_id = o.order_id and i.product_id = p.product_id