Funso (Chichewa): Ndi msika uti womwe unalemba mitengo ya chimanga masiku ambiri?
Question (English): Which market recorded maize prices on the most collection dates?
Table: commodity_prices (difficulty: medium)
SQL: SELECT market, COUNT(DISTINCT collection_date) FROM commodity_prices WHERE commodity = 'Maize' GROUP BY market ORDER BY COUNT(DISTINCT collection_date) DESC LIMIT 1;
Result: [('Ngabu', 5)]