title: Aggregate boolean values to true if any of the source columns is true
body: <p>Let say I have the following table:</p>
  
  <pre><code>id   column_a  column_b   column_c
  1     t          f           t
  2     t          f           f
  3     f          t           f
  </code></pre>
  
  <p>From the above table, I want to:</p>
  
  <pre><code>select rows from id = 1,2;
  </code></pre>
  
  <p>The result should be:</p>
  
  <pre><code>column_a   column_b   column_c
   t          f            t
  </code></pre>
  
  <p>If any of the rows among the defined id has a true for a particular column we assume the result to be true.</p>