title: How to determine future date
body: <p>Knowing a user's date of birth, how can I determine the date they will reach a certain age?</p>
  
  <p>I can calculate current age, but need to determine when, based on that calculation, to get the date of when they will turn a certain age, such as what date they will turn 18.</p>
  
  <pre><code>FLOOR(MONTHS_BETWEEN(TRUNC(sysdate), v.date_of_birth) / 12) age
  </code></pre>