Funso (Chichewa): Ndi mbewu iti yemwe ikuwonetsa kusiyana kwakukulu kwa mitengo m'dziko lonse?
Question (English): Which commodity shows the largest price variation nationwide?
Table: commodity_prices (difficulty: medium)
SQL: SELECT commodity, (MAX(price) - MIN(price)) FROM commodity_prices GROUP BY commodity ORDER BY (MAX(price) - MIN(price)) DESC LIMIT 1;
Result: [('Beans', 18842.23)]