title: Adding a new empty column to sql select query
body: <p>i have the following sql select query</p>
  
  <pre><code>select column1,column2 from mytable
  </code></pre>
  
  <p>is a way to add an empty column to the query that doesnt exist in the table such as</p>
  
  <pre><code>select column1,column2,empty int column from mytable
  </code></pre>