title: Figure out dependencies tree in database normalization
body: <p>Consider R: A B C D E F G H I J and given next dependecies:<BR></p>
  <pre><code>CE -&gt; J
  J -&gt; E 
  CJ -&gt; J 
  CJ -&gt; E
  C -&gt; D 
  D -&gt; J
  </code></pre>
  <p>I'm trying to figure out a dependencies tree. I suppose that CE -&gt; J -&gt; E is a redundant dependency so I can just delete that dependency. But can someone explain to me why?
  I'm not getting the ponit of not considering CE -&gt; J -&gt; E if J still needs CE to exist.</p>
  <p>This is not a homework. Im just trying to get into db normalization.</p>