title: What does "a" do at the end of a sql statement?
body: <p>I have a code here in the screenshot. At the end of the code you see a "a" </p>
  
  <p>When i try to remove the "a" and run the code, it fails but it works with the "a"</p>
  
  <p>what is the significance of this ?
  <img src="https://i.stack.imgur.com/A8Chg.png" alt="enter image description here"></p>