For the deal happened at 2012/8/24 12:42:00, which country was it?
'2012/8/24 12:42:00' can refer to date = '2012-08-24' AND T1.time = '12:42:00' in the database
SELECT T2.Country FROM transactions_1k AS T1 INNER JOIN gasstations AS T2 ON T1.GasStationID = T2.GasStationID WHERE T1.Date = '2012-08-24' AND T1.Time = '12:42:00'