-- Database schema
| artist : Artist_ID [ INT ] primary_key , Name [ TEXT ] , Country [ TEXT ] , Year_Join [ INT ] , Age [ INT ] | exhibition : Exhibition_ID [ INT ] primary_key , Year [ INT ] , Theme [ TEXT ] , Artist_ID [ INT ] exhibition.Artist_ID = artist.Artist_ID , Ticket_Price [ INT ] | exhibition_record : Exhibition_ID [ INT ] primary_key exhibition_record.Exhibition_ID = exhibition.Exhibition_ID , Date [ TEXT ] , Attendance [ INT ] |
-- -- Count the number of artists who are older than 46 and joined after 1990.

SELECT count(*) FROM artist WHERE age  >  46 AND year_join  >  1990;