A.3NF 2NF 1NF BCNF B.1NF 2NF 3NF BCNF C.1NF BCNF 2NF 3NF D.B

浪漫的邂逅2022-10-04 11:39:541条回答

A.3NF 2NF 1NF BCNF B.1NF 2NF 3NF BCNF C.1NF BCNF 2NF 3NF D.BCNF 3NF 2NF 1NF
6、下列关系运算的包含关系中正确的是.
A.3NF 2NF 1NF BCNF
B.1NF 2NF 3NF BCNF
C.1NF BCNF 2NF 3NF
D.BCNF 3NF 2NF 1NF

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银色冰棍 共回答了19个问题 | 采纳率89.5%
选D BCNF属于3NF属于 2NF属于 1NF
1年前

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