Challenge: The most expensive transmission + engine size combinations
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From the audi_cars table calculate the average price for each combination of transmission and enginesize. Round average price to 0 decimals (convert to integer). Filter to only those groups having at least 10 cars within. Sort the results in descending order by average price and extract only the first 5 rows.
Løsning
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SELECT transmission, enginesize, ROUND(AVG(price), 0)
FROM audi_cars
GROUP BY transmission, enginesize
HAVING COUNT(*) >= 10
ORDER BY AVG(price) DESC
LIMIT 5
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Sektion 6. Kapitel 7
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