title: Postgresql extract last row for each id
body: <p>Suppose I've next data</p>
  
  <pre><code>  id    date          another_info
    1     2014-02-01         kjkj
    1     2014-03-11         ajskj
    1     2014-05-13         kgfd
    2     2014-02-01         SADA
    3     2014-02-01         sfdg
    3     2014-06-12         fdsA
  </code></pre>
  
  <p>I want for each id extract last information:</p>
  
  <pre><code>  id    date          another_info
    1     2014-05-13         kgfd
    2     2014-02-01         SADA
    3     2014-06-12         fdsA
  </code></pre>
  
  <p>How could I manage that?</p>