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)

How many artists are above age 46 and joined after 1990?
SELECT COUNT(*) FROM artist WHERE age > 46 AND year_join > 1990
SELECT COUNT(*) FROM "artist" WHERE "age" > 46 AND "year_join" > 1990