Funso (Chichewa): Ndi maboma ati omwe analima mtedza m'nyengo zonse zolembedwa?
Question (English): Which districts produced groundnuts in every recorded season?
Table: production (difficulty: hard)
SQL: SELECT district FROM production WHERE crop = 'Groundnuts' GROUP BY district HAVING COUNT(DISTINCT season) = (SELECT COUNT(DISTINCT season) FROM production WHERE crop = 'Groundnuts');
Result: [('Balaka',), ('Blantyre',), ('Chikwawa',), ('Chiradzulu',), ('Chitipa',), ('Dedza',), ('Dowa',), ('Karonga',), ('Kasungu',), ('Likoma',), ('Lilongwe',), ('Machinga',), ('Mangochi',), ('Mchinji',), ('Mulanje',), ('Mwanza',), ('Mzimba',), ('Neno',), ('Nkhata Bay',), ('Nkhotakota',), ('Nsanje',), ('Ntcheu',), ('Ntchisi',), ('Phalombe',), ('Rumphi',), ('Salima',), ('Thyolo',), ('Zomba',)]