For relation R where primary key contains multiple attributes,no non-key attribute should be functionally dependent on a part of the primary key. This relation R is at least in
A. 1NF
B.2NF
C.3NF
D.BCNF
发布时间:2024-05-04正确答案:B
●For relation where primary key contains multiple at
●For relation where primary key contains multiple attributes,no non-key attribute should be functionally dependent on a part of primary key.This relation R is at least in (66) (66) A.3NFB.2NFC.INFD.BCNF
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For relation R where primary key contains multiple, no non-key attribute should be functionally dependent on a part of the primary key This relation R is at least inA.1NFB.2NFC.3NFD.BCNF
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答案解析For relation where primary key contains multiple attr
For relation where primary key contains multiple attributes, no non-key attribute should be functionally dependent on a part of primary key This relation R is at least in(66) A.3NFB.2NFC.INFD.BCNF
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