title: Why can't you just join in fan trap?
body: <p>I'm trying to understand what exactly a fan trap is.</p>
  
  <p>I don't understand why can't you know the account a sales rep handles?</p>
  
  <p>Can't you just join the tables Sales Rep, Branch and Account and find out? What am I missing?
  <a href="https://i.stack.imgur.com/3zxOR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3zxOR.png" alt="enter image description here"></a></p>