Funso (Chichewa): Ndi boma liti lomwe linalemba mitengo ya mpunga koma osati wa khobwe?
Question (English): Which district has recorded prices for rice but not for cow peas?
Table: commodity_prices (difficulty: hard)
SQL: SELECT DISTINCT district FROM commodity_prices WHERE commodity = 'Rice' AND district NOT IN (SELECT district FROM commodity_prices WHERE commodity = 'Cow peas');
Result: [('Chitipa',), ('Mzimba',), ('Nkhata Bay',), ('Salima',), ('Phalombe',), ('Rumphi',)]