Problems are based on the following query: SELECT CUS_CODE, MAX(LINE_UNITS*LINE_PRICE) FROM CUSTOMER NATURAL JOIN INVOICE NATURAL JOIN LINE WHERE CUS_AREACODE = '615' GROUP BY CUS_CODE; Assuming that you generate 15,000 invoices per month, what recommendation would you give the designer about the use of derived attributes?
Problems are based on the following query: SELECT CUS_CODE, MAX(LINE_UNITS*LINE_PRICE) FROM CUSTOMER NATURAL JOIN INVOICE NATURAL JOIN LINE WHERE CUS_AREACODE = '615' GROUP BY CUS_CODE; Assuming that you generate 15,000 invoices per month, what recommendation would you give the designer about the use of derived attributes?
Chapter4: Constraints
Section: Chapter Questions
Problem 1RQ: What is the difference between a PRIMARY KEY constraint and a UNIQUE constraint?
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Problems are based on the following query:
SELECT CUS_CODE, MAX(LINE_UNITS*LINE_PRICE)
FROM CUSTOMER NATURAL JOIN INVOICE NATURAL JOIN LINE
WHERE CUS_AREACODE = '615'
GROUP BY CUS_CODE;
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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