题目内容:
●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.3NF
B.2NF
C.INF
D.BCNF
参考答案:
(66) A.3NF
B.2NF
C.INF
D.BCNF