Question: SELECTCUS _ CODE, MAX ( LINE _ UNITS * LINE _ PRICE ) FROMCUSTOMER NATURAL JOIN INVOICE NATURAL JOIN LINEWHERECUS _ AREACODE = 6 1

SELECTCUS_CODE, MAX(LINE_UNITS*LINE_PRICE)FROMCUSTOMER NATURAL JOIN INVOICE NATURAL JOIN LINEWHERECUS_AREACODE =615GROUP BYCUS_CODE;
29.
Assuming that you generate 15,000 invoices per month, what recommendation would you give the designer about the use of derived attributes?

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