title: How to select a column that doesn't exist in a table and return a NULL result for all rows returned
body: <p>I have a query, that I'm looking to select a column that doesn't exist and just fill it with "NULL" in the results. The data is being exported to a .CSV File for import to another database which has the column. For example:</p>
  
  <p>My query is: </p>
  
  <pre><code>Select col1, col2, col3
  from table1
  </code></pre>
  
  <p>Output is:</p>
  
  <pre><code>col1      col2     col3
   1          5        9
   2          6       10
   3          7       11
   4          8       12
  </code></pre>
  
  <p>I'd like the output to be:</p>
  
  <pre><code>col1      col2     col3    col4
   1          5        9     NULL
   2          6       10     NULL
   3          7       11     NULL
   4          8       12     NULL
  </code></pre>