title: Transform set of data into a single column
body: <p>Lets say I have this set of integers enclosed in the parenthesis (1,2,3,4,5).</p>
  
  <p>Data I have: </p>
  
  <pre><code>(1,2,3,4,5)
  </code></pre>
  
  <p>And I would want them to be in a single column.</p>
  
  <p>Expected Output:</p>
  
  <pre><code> column 
  --------
        1
        2
        3
        4
        5
  (5 rows)
  </code></pre>
  
  <p>How can I do this? I've tried using array then unnest but with no luck. I know I'm doing something wrong.
  I need this to optimize a query that is using a large IN statement, I want to put it in a temp table then join it on the main table.</p>