title: SQL date difference ignoring years
body: <p>I have two date columns and I would like to calculate their differences in Months/Days and exclude years. </p>
  
  <p>Assuming the first date is 10/30/2017, comparing it to the current date, its difference should one. If the current date is 10/30/2018, the difference should also be one. </p>
  
  <p>A few examples:</p>
  
  <pre><code>Schedule Date:10/30/2017   Current Date 10/29/2017  Diff  1
  Schedule Date:10/30/2017   Current Date 11/30/2017  Diff 30
  Schedule Date:10/30/2017   Current Date 10/29/2018  Diff 1
  Schedule Date:10/30/2017   Current Date 11/30/2018  Diff 30
  Schedule Date:10/30/2017   Current Date 10/29/2019  Diff 1
  Schedule Date:10/30/2017   Current Date 11/30/2019  Diff 30
  </code></pre>