title: What is the difference between an ERD and a "relational diagram"?
body: <p>I was asked to draw the ERD and relational diagram of a table, I previously assumed that the relational diagram was the same as a ERD so what is the difference?</p>
  
  <p><img src="https://i.stack.imgur.com/dWmQ1.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/2caNh.png" alt="enter image description here"></p>