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

admin2005-05-04  139
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
转载请注明原文地址:https://kaotiyun.com/show/tnNZ777K
0

笔试

原NCRE全国计算机四级

NCRE全国计算机四级

相关试题推荐
随机试题
最新回复(0)