2. 计算机
  3. Suppose we have the relation schema R(A,B,C,D)with functional dependencies;F{A→B,B→C,C→D,D→A},then R(A,B,C,D)at least is in

Suppose we have the relation schema R(A,B,C,D)with functional dependencies;F{A→B,B→C,C→D,D→A},then R(A,B,C,D)at least is in

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问题 Suppose we have the relation schema R(A,B,C,D)with functional dependencies;F{A→B,B→C,C→D,D→A},then R(A,B,C,D)at least is in
选项 A、1NF
B、2NF
C、3NF
D、BCNF
答案D
解析
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原NCRE全国计算机四级

NCRE全国计算机四级

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