CREATE TABLE train (id NUMBER, train_number NUMBER, name CLOB, origin CLOB, destination CLOB, time CLOB, interval CLOB)
CREATE TABLE station (id NUMBER, network_name CLOB, services CLOB, local_authority CLOB)
CREATE TABLE weekly_weather (station_id NUMBER, day_of_week CLOB, high_temperature NUMBER, low_temperature NUMBER, precipitation FLOAT, wind_speed_mph NUMBER)
CREATE TABLE route (train_id NUMBER, station_id NUMBER)

Return a histogram on what is the average high temperature for each day of week?, display in asc by the total number.
SELECT day_of_week, AVG(high_temperature) FROM weekly_weather GROUP BY day_of_week ORDER BY AVG(high_temperature)
SELECT "day_of_week", AVG("high_temperature") FROM "weekly_weather" GROUP BY "day_of_week" ORDER BY AVG("high_temperature")