Introduction
GROUP BY – Recap
ROLLUP
Instruction
Good job! It's your turn now—try a similar exercise with the Delivery table.
Exercise
Show how much was spent on average for each Category on each day and on each day in general. Show the following columns: Category, DeliveryDate, and the average TotalPrice (name the column AvgPrice). Do not show a single general average among all days and categories.
Stuck? Here's a hint!
Use:
GROUP BY ROLLUP(Category), DeliveryDate
