CREATE TABLE products (code NUMBER, name CLOB, price NUMBER, manufacturer NUMBER)
CREATE TABLE manufacturers (code NUMBER, name CLOB, headquarter CLOB, founder CLOB, revenue NUMBER)

What is the total revenue of all companies whose main office is at Tokyo or Taiwan?
SELECT SUM(revenue) FROM manufacturers WHERE headquarter = 'Tokyo' OR headquarter = 'Taiwan'
SELECT SUM("revenue") FROM "manufacturers" WHERE "headquarter" = 'Taiwan' OR "headquarter" = 'Tokyo'