title: Adding space to a string after 3 characters starting from right in mysql
body: <p>I have a requirement where at first I need to remove all space from a string, then put a space after 3 characters started from right.  </p>
  
  <p>I have removed the spaces but putting space after certain characters is not happening.</p>
  
  <p>IE:</p>
  
  <pre><code>AX1098 
  AX1 098  
  </code></pre>