title: How to get customers age from MySQL Date
body: <pre><code>birthday
  ------------
  1988-10-09
  1919-12-12
  </code></pre>
  
  <p>How to calculate the age properly and rounded?</p>
  
  <p>I have this:</p>
  
  <pre><code>SELECT
  ROUND((TO_DAYS(NOW()) - TO_DAYS(birthday)) / 365)
  FROM customer
  </code></pre>
  
  <p>Is there something more accurate?</p>