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

Show theme and year for all exhibitions in an descending order of ticket price.
SELECT theme, year FROM exhibition ORDER BY ticket_price DESC
SELECT "theme", "year" FROM "exhibition" ORDER BY "ticket_price" DESC