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

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