Question: Find the average ride time of the bikes that started at Steuart at Market station and ended at Embarcadero at Sansome station in July 2014.
SQL: SELECT AVG(duration) FROM trip WHERE start_date = '7/1/2014%' AND end_date = '7/31/2014%' AND start_station_name = 'Steuart at Market' AND end_station_name = 'Embarcadero at Sansome'