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Write a SELECT statement that uses aggregate window functions to calculate the order total for each customer and the order total for each customer by date. Return these columns: The customer_id column from the Orders table The order date column from the Orders table The total amount for each order item in the Order_Items table The sum of the order totals for each customer The sum of the order totals for each customer by date (Hint: You can create a peer group to get these values)

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