title: Mysql query error unix timestamp
body: <p>can anybody explain me how this Mysql query result is possible.</p>
  
  <pre><code>select 
  sec_to_time(
  unix_timestamp('2014-10-26 02:00:00')-
  unix_timestamp('2014-10-25 20:00:00')
  );
  </code></pre>
  
  <p>result:</p>
  
  <pre><code>07:00:00
  </code></pre>
  
  <p>should be: </p>
  
  <pre><code>06:00:00
  </code></pre>