| select product_class.product_department as c0 from product_class as product_class, product as product, sales_fact_1997 as sales_fact_1997 where sales_fact_1997.product_id = product.product_id and product.product_class_id = product_class.product_class_id and product_class.product_family = 'Food' group by product_class.product_department order by product_class.product_department ASC NULLS LAST; |