Funso (Chichewa): Kodi ndi mbewu zingati zomwe mtengo wake sunadutse 1000?
Question (English): How many commodities have never exceeded a price of 1000?
Table: commodity_prices (difficulty: hard)
SQL: SELECT COUNT(*) FROM (SELECT commodity FROM commodity_prices GROUP BY commodity HAVING MAX(price) <= 1000);
Result: [(0,)]