In weather station 17, which store sold the highest quantity of item 45 in October 2012?
weather station 17 refers to station_nbr = 17; item 45 refers to item_nbr = 45; in October 2012 refers to SUBSTR(date, 1, 7) = '2012-10': highest quantity refers to Max(Sum(units)); store refers to store_nbr
SELECT T1.store_nbr FROM sales_in_weather AS T1 INNER JOIN relation AS T2 ON T1.store_nbr = T2.store_nbr WHERE T1.item_nbr = 45 AND T2.station_nbr = 17 AND T1.`date` LIKE '%2012-10%' GROUP BY T1.store_nbr ORDER BY SUM(T1.units) DESC LIMIT 1