title: sum of Times in SQL
body: <p>I have some records like this:  </p>
  
  <pre><code>ID       Personel_Code        Time 
  ---      -------------       ------ 
  1         0011                05:50
  3         0011                20:12
  4         0012                00:50
  </code></pre>
  
  <p>I want to have the sum of times for each person. in this example I want to have the result like this :  </p>
  
  <pre><code>Personel_Code          Time
  -------------          -----
   0011                  26:02
   0012                   00:50
  </code></pre>
  
  <p>Thank you.</p>