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

Draw a bar chart for how many stadiums does each country have?, and show total number in asc order.
SELECT Country, COUNT(*) FROM stadium GROUP BY Country ORDER BY COUNT(*)
SELECT "Country", COUNT(*) FROM "stadium" GROUP BY "Country" ORDER BY COUNT(*)