Funso (Chichewa): Ndi zokolola ziti zomwe zili ndi mitengo yolembedwa m'maboma ochepa kwambiri?
Question (English): Which commodity has prices recorded in the fewest districts?
Table: commodity_prices (difficulty: medium)
SQL: SELECT commodity, COUNT(DISTINCT district) FROM commodity_prices GROUP BY commodity ORDER BY COUNT(DISTINCT district) ASC LIMIT 1;
Result: [('Cow peas', 20)]