title: PL/SQL check date is valid
body: <p>If I have a date format <code>DDMM</code> in PL/SQL and I want to validate it. What is the correct way to do it?</p>
  
  <p><code>DD</code> is the day and <code>MM</code> is the moth.</p>
  
  <pre><code>For an example:
  0208 - is a valid date
  3209 - is not a valid date
  0113 - is not a valid date.
  </code></pre>