Introduction
CUBE
Instruction
Well done! You know the drill; it’s your turn now.
Exercise
Show the average wildfire duration for all grouping combinations based on the year and month columns. Also, group each row by cause.
Show the following columns in the query result: year, month, cause, and avg_duration.
Stuck? Here's a hint!
Use the following template:
SELECT ... FROM ... GROUP BY CUBE (x, y), z
