CREATE TABLE exhibition_record (Exhibition_ID NUMBER, Date CLOB, Attendance NUMBER)
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)

What are the average ages of artists by countries? Visualize the result with a histogram, and I want to display in asc by the total number.
SELECT Country, AVG(Age) FROM artist GROUP BY Country ORDER BY AVG(Age)
SELECT "Country", AVG("Age") FROM "artist" GROUP BY "Country" ORDER BY AVG("Age")