database - Canonical Cover example

Question

I'm learning for my exams in the course databases and have some problems with the functional dependencies.

So I got the functional dependencies:

A->BE, AE->BD, F->CD, CD->BEF, CF->B

After decomposition and left-reduction I get:

A->B, A->E, A->D, F->B, F->C, F->D, CD->B, CD->E, CD->F

So after checking for transitivity's I get as solution:

A-> BDE, F->CD, CD->BEF

But I'm not sure if its right. I did the same steps like in this tutorial here:

Thanks for any help!

score 0 · Accepted Answer

好吧，我找到了这个页面来计算规范封面：

对于输入来说重要的是每个属性之间必须有一个空格。

所以我发现我的解决方案是正确的。

这是我的例子：

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