Funso (Chichewa): Ndi chakudya chiti chomwe chikuonesa kusiyana kochepa kwa mitengo?
Question (English): Which commodity shows the smallest price variation?
Table: commodity_prices (difficulty: medium)
SQL: SELECT commodity, (MAX(price) - MIN(price)) FROM commodity_prices GROUP BY commodity ORDER BY (MAX(price) - MIN(price)) ASC LIMIT 1;
Result: [('Maize', 1610.83)]