Funso (Chichewa): Kodi mtengo wachimanga wapakatikati mdziko muno ndi uti?
Question (English): What is the national average Maize price on the most recent collection date?
Table: commodity_prices (difficulty: hard)
SQL: SELECT AVG(price) AS average_price
FROM commodity_prices
WHERE commodity = 'Maize'
  AND collection_date = (
      SELECT MAX(collection_date)
      FROM commodity_prices
      WHERE commodity = 'Maize'
  );
Result: [(599.5864912289475,)]