all done in cengage and this is everything that comes with the assignment, write a query… Problem 17 Use a query to show the invoices and invoice totals in Figure P7.17. Sort the results by customer code and then by invoice number. Problem 18 Write a query to produce the number of invoices and the total purchase amounts by customer, using the output shown in Figure P7.18 as your guide. Note the results are sorted by customer code. (Compare this summary to the results shown in Problem 17.) Problem 19 Write a query to generate the total number of invoices, the invoice total for all of the invoices, the smallest of the customer purchase amounts, the largest of the customer purchase amounts, and the average of all the customer purchase amounts. Your output must match Figure P7.19. Problem 20 List the balances of customers who have made purchases during the current invoice cycle—that is, for the customers who appear in the INVOICE table. Sort the results by customer code, as shown in Figure P7.20. all done in cengage and this is everything that comes with the assignment, write a query… Problem 17 Use a query to show the invoices and invoice totals in Figure P7.17. Sort the results by customer code and then by invoice number. Problem 18 Write a query to produce the number of invoices and the total purchase amounts by customer, using the output shown in Figure P7.18 as your guide. Note the results are sorted by customer code. (Compare this summary to the results shown in Problem 17.) Problem 19 Write a query to generate the total number of invoices, the invoice total for all of the invoices, the smallest of the customer purchase amounts, the largest of the customer purchase amounts, and the average of all the customer purchase amounts. Your output must match Figure P7.19. Problem 20 List the balances of customers who have made purchases during the current invoice cycle—that is, for the customers who appear in the INVOICE table. Sort the results by customer code, as shown in Figure P7.20.

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