title: Is there anyway to do math on a MySQL query?
body: <p>I have two fields, one with the purchase date and one with the lifespan of an item. I am wondering if there is any way to determine if the current date is past the lifespan. So, pretty much if MySQL could test if current_date is > purchase_date + lifespan.</p>
  
  <p>The purchase date is a date formated yyyy-mm-dd and lifespan is an integer of months. Is there any way to perform this calculation? </p>