title: Change meta_value relating to specific meta_key
body: <p>I have a wordpress directory theme in which a bunch of listings are about to expire. The were all created on different days. I want to batch update the whole database so that all my listings are reset for another year as of today.</p>
  
  <p>They related to the table wp_postmeta and the meta_key is "alive_days" and I need to update the pertaining meta_value.</p>
  
  <p>If anyone can suggest an SQL query to fix this, I will be saved a from pulling out my hair.</p>
  
  <p>Thanks in advance.</p>
  
  <p>LLG</p>
  
  <p>See <a href="http://snag.gy/KfJfB.jpg" rel="nofollow">http://snag.gy/KfJfB.jpg</a> for screengrab of the database.</p>