Database schema:

CREATE TABLE station (
	id INTEGER NOT NULL -- example: ['2', '3'],
	name TEXT -- example: ['San Jose Diridon Caltrain Station', 'San Jose Civic Center'],
	lat REAL -- example: ['37.329732', '37.330698'],
	long REAL -- example: ['-121.90178200000001', '-121.888979'],
	dock_count INTEGER -- example: ['15', '27'],
	city TEXT -- example: ['Redwood City', 'San Jose'],
	installation_date TEXT -- example: ['8/6/2013', '8/5/2013'],
	PRIMARY KEY (id)
)


CREATE TABLE status (
	station_id INTEGER -- example: ['2', '3'],
	bikes_available INTEGER -- example: ['2', '3'],
	docks_available INTEGER -- example: ['24', '25'],
	time TEXT -- example: ['2013/08/29 12:06:01', '2013/08/29 12:07:01']
)


CREATE TABLE trip (
	id INTEGER NOT NULL -- example: ['4073', '4069'],
	duration INTEGER -- example: ['174', '1067'],
	start_date TEXT -- example: ['8/29/2013 9:08', '8/29/2013 9:24'],
	start_station_name TEXT -- example: ['South Van Ness at Market', '2nd at South Park'],
	start_station_id INTEGER -- example: ['64', '66'],
	end_date TEXT -- example: ['8/29/2013 9:11', '8/29/2013 9:42'],
	end_station_name TEXT -- example: ['San Francisco Caltrain 2 (330 Townsend)', '2nd at South Park'],
	end_station_id INTEGER -- example: ['64', '69'],
	bike_id INTEGER -- example: ['288', '321'],
	subscription_type TEXT -- example: ['Customer', 'Subscriber'],
	zip_code INTEGER -- example: ['94114', '94703'],
	PRIMARY KEY (id)
)


CREATE TABLE weather (
	date TEXT -- example: ['8/30/2013', '8/29/2013'],
	max_temperature_f INTEGER -- example: ['78', '74'],
	mean_temperature_f INTEGER -- example: ['68', '69'],
	min_temperature_f INTEGER -- example: ['60', '61'],
	max_dew_point_f INTEGER -- example: ['61', '57'],
	mean_dew_point_f INTEGER -- example: ['58', '56'],
	min_dew_point_f INTEGER -- example: ['54', '56'],
	max_humidity INTEGER -- example: ['93', '90'],
	mean_humidity INTEGER -- example: ['75', '70'],
	min_humidity INTEGER -- example: ['50', '57'],
	max_sea_level_pressure_inches REAL -- example: ['30.05', '30.07'],
	mean_sea_level_pressure_inches REAL -- example: ['30.02', '30.0'],
	min_sea_level_pressure_inches REAL -- example: ['29.93', '29.97'],
	max_visibility_miles INTEGER -- example: ['9', '10'],
	mean_visibility_miles INTEGER -- example: ['9', '10'],
	min_visibility_miles INTEGER -- example: ['7', '10'],
	"max_wind_Speed_mph" INTEGER -- example: ['23', '29'],
	mean_wind_speed_mph INTEGER -- example: ['11', '13'],
	max_gust_speed_mph INTEGER -- example: ['28', '35'],
	precipitation_inches TEXT -- example: ['0', '0.23'],
	cloud_cover INTEGER -- example: ['2', '4'],
	events TEXT -- example: ['', 'Fog'],
	wind_dir_degrees INTEGER -- example: ['286', '291'],
	zip_code TEXT -- example: ['94063', '94107']
)

Question: Which bicycle is the least used bike. Check if the start and end station are from the same city and calculate the total duration travelled by the bicycle in hours for a trip made within the same city.
Evidence: least used bike refers to bike_id with MIN(COUNT(main_trip.id)); start station refers to start_station_name; end station refers to end_station_name; total duration in hour = DIVIDE(duration, 3600) AS hour;

SQL:
SELECT T2.bike_id, T2.start_station_name, T2.end_station_name, T1.city , CAST(T2.duration AS REAL) / 3600 FROM station AS T1 INNER JOIN trip AS T2 ON T1.name = T2.start_station_name GROUP BY T2.bike_id ORDER BY COUNT(T2.id) DESC LIMIT 1