●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
●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
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