CREATE TABLE artist (artist_id NUMBER, name CLOB, country CLOB, year_join NUMBER, age NUMBER)
CREATE TABLE exhibition (exhibition_id NUMBER, year NUMBER, theme CLOB, artist_id NUMBER, ticket_price NUMBER)
CREATE TABLE exhibition_record (exhibition_id NUMBER, date CLOB, attendance NUMBER)

What is the average and minimum age of all artists from United States.
SELECT AVG(age), MIN(age) FROM artist WHERE country = 'United States'
SELECT AVG("age"), MIN("age") FROM "artist" WHERE "country" = 'United States'