Deals Of The Week - hours only!Up to 80% off on all courses and bundles.-Close
Introduction
Quiz
7. Question 5
The End

## Instruction

Well done! We have one more question for you.

## Exercise

Find the average fuel cost rounded to two decimal places for the following grouping combinations:

1. year, month, and day
2. year and month
3. year
4. car_size and trip_type
5. country

Show also the general average fuel cost.

Assume a fuel price of \$0.98 per liter. Show the following columns in the query result: year, month, day, car_size, trip_type, country, and avg_fuel_cost.

### Stuck? Here's a hint!

Use GROUP BY GROUPING SETS with a ROLLUP inside:

GROUP BY GROUPING SETS
(
ROLLUP (A, B, C),
(D, E),
(F)
)