title: How to update a timestamp field of a mysql table ?
body: <p>I want to update all the empty logout_time fields into 2011-12-26 14:48:36.</p>
  
  <p>I tried the following query so as to update the logout_time field (timestamp) in the log_details table:</p>
  
  <pre><code>update log_details set logout_time='2011-12-26 14:48:36',tab_status='0' 
  where logout_time =''
  </code></pre>
  
  <p>It doesn't work. Please help me to fix it.</p>