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题目内容
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In the following statements about functional dependency, which one is incorrect?
A.If X→Y and Y→Z, then X→Z.
B.If X→Y and, then X→Y'.
C.If X→Y and, then X'→Y.
D.If, then X→X'.
参考答案
更多 “ In the following statements about functional dependency, which one is incorrect?A.If X→Y and Y→Z, then X→Z.B.If X→Y and, then X→Y'.C.If X→Y and, then X'→Y.D.If, then X→X'. ” 相关考题
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