title: Select differentiating records from two tables
body: <p>I have two tables with a field called <code>Date</code>. I want to select only the dates of <code>Table1</code> that are diferent from <code>Table2</code>. </p>
  
  <p>In this case, the result would be 4 and 5.</p>
  
  <pre><code>Table1     Table2     Result
  Date       Date       Date
  1          1          4
  2          2          5
  3          3
  4
  5
  </code></pre>