CREATE TABLE exhibition (Exhibition_ID NUMBER, Year NUMBER, Theme CLOB, Artist_ID NUMBER, Ticket_Price FLOAT)
CREATE TABLE artist (Artist_ID NUMBER, Name CLOB, Country CLOB, Year_Join NUMBER, Age NUMBER)
CREATE TABLE exhibition_record (Exhibition_ID NUMBER, Date CLOB, Attendance NUMBER)

Show how many country from each country, show bars in desc order.
SELECT Country, COUNT(Country) FROM artist GROUP BY Country ORDER BY Country DESC
SELECT "Country", COUNT("Country") FROM "artist" GROUP BY "Country" ORDER BY "Country" DESC