Instruction
Great! Don't give up!
Exercise
Select the first and last name of each client, the name of the category they purchased from (in any of their orders), and the total amount of money they spent on this product category (name this column TotalAmount).
Stuck? Here's a hint!
You need to use regular JOINs to join all tables from our database.
Sum all prices and group by first and last name of a client, and by the name of a category.



