Question: Consider Figure 1-15 . While designing the attributes for the Customer table, is it necessary to designate an attribute, such as Customer ID, as a

Consider Figure 1-15. While designing the attributes for the Customer table, is it necessary to designate an attribute, such as Customer ID, as a key field? Can we use an ordinary attribute, such as Customer Name, to determine the existence of a customer record? Why?

Figure 1-15

CUSTOMER Places ORDER Contains Is Billed On INVOICE Is Paid On ORDER

CUSTOMER Places ORDER Contains Is Billed On INVOICE Is Paid On ORDER LINE PAYMENT Has PRODUCT LINE Includes PRODUCT

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Consider Figure 1-15. While designing the attributes for the Customer table, is it necessary to designate an attribute, such as Customer ID, as a key field? Can we use an ordinary attribute, such as...

Consider Figure 1-15. When designing the attributes for Customer table, is it necessary to designate an attribute, such as Customer ID, as a key field? Can we use an ordinary attribute, such as...

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