CREATE TABLE stadium (ID INT, name TEXT, Capacity INT, City TEXT, Country TEXT, Opening_year INT)
CREATE TABLE event (ID INT, Name TEXT, Stadium_ID INT, Year TEXT)
CREATE TABLE record (ID INT, Result TEXT, Swimmer_ID INT, Event_ID INT)
CREATE TABLE swimmer (ID INT, name TEXT, Nationality TEXT, meter_100 FLOAT, meter_200 TEXT, meter_300 TEXT, meter_400 TEXT, meter_500 TEXT, meter_600 TEXT, meter_700 TEXT, Time TEXT)

Give me the comparison about the average of ID over the Nationality , and group by attribute Nationality by a bar chart, and list from low to high by the Y.
SELECT Nationality, AVG(ID) FROM swimmer GROUP BY Nationality ORDER BY AVG(ID)
SELECT "Nationality", AVG("ID") FROM "swimmer" GROUP BY "Nationality" ORDER BY AVG("ID") NULLS FIRST