mat5ukawa https://blog.hatena.ne.jp/mat5ukawa/ 現場ログ https://mat5ukawa.hateblo.jp/ Design 関数従属性/部分関数従属性 candidate key => 候補キー => (主キーの候補となるキー and タプルを一意に識別できる and 極小) non-key attribute => (主キーを含めていかなる候補キーにも属していない属性) Definition and ex Given and ... only is true and any such like are false ... {1} then Functional dependecy is satisfied. ... when {1} is true example is true then partial fun… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmat5ukawa.hateblo.jp%2Fentry%2F2014%2F02%2F02%2F000554" title="Functional dependency ; Design - 現場ログ" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> http://chart.apis.google.com/chart?cht=tx&chl=%20%28%5Ctextit%7B%20candidate%20key%3A%20X%20%7D%29%20%5Crightarrow%20%28%5Ctextit%7B%20non-key%20attribute%3A%20Y%20%7D%29%20 Hatena Blog https://hatena.blog 2014-02-02 00:05:54 rich https://mat5ukawa.hateblo.jp/entry/2014/02/02/000554 1.0 100%