title: sql query adding column values
body: <p>I want to add two columns values of my table and sort it in descending order. E.g:</p>
  
  <pre><code>int_id   int_test_one  int_test_2
   1           25           13    
   2           12           45    
   3           25           15
  </code></pre>
  
  <p>Considering the table above, I want a SQL query which give me the result like below:</p>
  
  <pre><code>   int_id  sum(int_test_one,int_test_two)
      2              57
      3              40   
      1              38
  </code></pre>
  
  <p>Is there any sql query to do this?</p>