There is a table: sales_d, which contains the following fields: brd comment 'brand', md comment 'model', 'smd' comment 'model name', 'pt' comment 'price segment', 'prv' comment 'province', 'ct' comment 'city', 'ctl' comment 'city level', 'cty' comment 'district', 'a1' comment 'first-level agent', 'a2' comment 'second-level agent', 'woy' comment 'Week', 'dow' comment 'day of the week', 'cnt' comment 'sales', 'fs' comment 'whether to fold', dt comment 'date', please give sql