title: How can order the result , MYSQL
body: <p>I have a database with a table 'Posts Table'.</p>
  
  <p>In this table there are posts id, count user comment and count visitors comment.</p>
  
  <p>I want to extra the top posts which have most comments </p>
  
  <p>But the problem is there is two columns for comment (users comment, visitors comment).</p>
  
  <p>I want the result like this , (usercomment + visitors comment) ,</p>
  
  <p>How can I use SQL to do this?</p>
  
  <p><img src="https://i.stack.imgur.com/WbnOA.jpg" alt="enter image description here"></p>