title: mysql select people older than 3 months and younger than
body: <p>I have mysql table people with row "born".
  In born I have </p>
  
  <pre><code>born
  ----
  2013-07-15
  2010-11-29
  2013-11-01
  </code></pre>
  
  <p>etc.
  How can I make mysql query to select people older than 3 months so it should compare row "born"? in this case it should return first and second item.</p>
  
  <p>And how to select people younger than 4 years? in this case it should return all items.
  I would like to port it so select older/younger than day, x days, month, months, year, years etc.</p>
  
  <p>many thanks</p>