How many inches of total precipitation was recorded by the weather station of store no.2 on 2012/12/25?
store no.2 refers to store_nbr = 2; on 2012/12/25 refers to date = '2012-12-25'; total precipitation refers to preciptotal
SELECT T1.preciptotal FROM weather AS T1 INNER JOIN relation AS T2 ON T1.station_nbr = T2.station_nbr WHERE T1.`date` = '2012-12-25' AND T2.store_nbr = 2