Funso (Chichewa): Ndi chakudya chiti chomwe mitengo yake inalembedwa m'maboma onse?
Question (English): Which commodity had prices recorded in all districts?
Table: commodity_prices (difficulty: hard)
SQL: SELECT commodity FROM commodity_prices GROUP BY commodity HAVING COUNT(DISTINCT district) = (SELECT COUNT(DISTINCT district) FROM commodity_prices);
Result: [('Beans',), ('Groundnuts',)]