CREATE TABLE train_station (Train_ID INT, Station_ID INT)
CREATE TABLE train (Train_ID INT, Name TEXT, Time TEXT, Service TEXT)
CREATE TABLE station (Station_ID INT, Name TEXT, Annual_entry_exit FLOAT, Annual_interchanges FLOAT, Total_Passengers FLOAT, Location TEXT, Main_Services TEXT, Number_of_Platforms INT)

Give me a bar chart about the average of number_of_platforms in different locations, and rank X from low to high order.
SELECT Location, AVG(Number_of_Platforms) FROM station GROUP BY Location ORDER BY Location
SELECT "Location", AVG("Number_of_Platforms") FROM "station" GROUP BY "Location" ORDER BY "Location" NULLS FIRST