title: Subtract two dates in sql to hhhh:mm:ss
body: <p>I want to subtract two dates and get hhhh:mm:ss when the number of hours may be greater than 24</p>
  
  <p>And I do not want to limit the number of hours by hhhh.
  I have two dates, 
  <code>date1='1900-01-01 00:00:00.000'</code> and 
  <code>date2='1900-01-02 01:00:00.000'</code>. 
  I want to get: </p>
  
  <pre><code>date2-date1 = '25:00:00.0' 
  </code></pre>