Find the day in which the difference between the max temperature and min temperature was the smallest. Also report the difference.
SELECT date ,  max_temperature_f - min_temperature_f FROM weather ORDER BY max_temperature_f - min_temperature_f LIMIT 1
SELECT date ,  max_temperature_f - min_temperature_f FROM weather ORDER BY max_temperature_f - min_temperature_f LIMIT 1
[{'date': '4/16/2015', 'max_temperature_f - min_temperature_f': 0}]