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Regarding the schema below, why is the link NOT optimized?

Posted: Thu Jul 21, 2022 9:08 pm
by answerhappygod
Regarding the schema below, why is the link NOT optimized?
Regarding The S 1
Regarding The S 1 (88.71 KiB) Viewed 46 times
A. Integrity rules are not defined
B. The sequence for filling primary key values is not defined
C. The automatic primary key is not used
D. There is no unique index on the idPurchase attribute