title: View two SQL tables simultaneously without using union
body: <p>I am using PostgreSQL and I am trying to view two tables at the same time. Yes, I already know about union, but my objective is to view two tables simultaneously without using union. The top picture is what I am trying to achieve and the bottom picture is my error. Thanks in advance.</p>
  
  <p><a href="https://i.stack.imgur.com/JdHdY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JdHdY.png" alt="What I am trying to achieve."></a>
  <a href="https://i.stack.imgur.com/JknXk.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JknXk.jpg" alt="What I have so far."></a></p>