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Leer Challenge: Relation between engine size and fuel consumption | Practicing
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Challenge: Relation between engine size and fuel consumption

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From the audi_cars table calculate the average fuel consumption (mpg column) for each engine size (enginesize). Order results in descending order by the average value of mpg. Expected output: enginesize | average mpg.

Oplossing

SELECT enginesize, AVG(mpg)
FROM audi_cars
GROUP BY enginesize
ORDER BY AVG(mpg) DESC

The result may seem strange, but don't forget that the mpg column refers to miles per gallon. The greater this value, the less fuel car consumes.

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