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)

Return the names of artists and the themes of their exhibitions that had a ticket price higher than average.
SELECT T1.theme, T2.name FROM exhibition AS T1 JOIN artist AS T2 ON T1.artist_id = T2.artist_id WHERE T1.ticket_price > (SELECT AVG(ticket_price) FROM exhibition)
SELECT "T1"."theme", "T2"."name" FROM "exhibition" "T1" JOIN "artist" "T2" ON "T1"."artist_id" = "T2"."artist_id" WHERE "T1"."ticket_price" > (SELECT AVG("ticket_price") FROM "exhibition")