försök
select cars.* FROM cars
INNER JOIN (
select country, max(price) AS maxprice from cars
GROUP BY country
) m
ON cars.country = m.country AND cars.price = m.maxprice
försök
select cars.* FROM cars
INNER JOIN (
select country, max(price) AS maxprice from cars
GROUP BY country
) m
ON cars.country = m.country AND cars.price = m.maxprice