What are the average, minimum, and maximum ticket prices for exhibitions that happened prior to 2009?
SELECT avg(ticket_price) ,  min(ticket_price) ,  max(ticket_price) FROM exhibition WHERE YEAR  <  2009
average ticket price = AVG(ticket_price); minimum ticket price = MIN(ticket_price); maximum ticket price = MAX(ticket_price); exhibitions that happened prior to 2009 refers to YEAR < 2009;