title: Populate a numeric column with random values
body: <p>This is my table: <a href="http://i.stack.imgur.com/aTnwX.png" rel="nofollow">Table</a></p>
  
  <p>I did this to populate it:</p>
  
  <pre><code>update AEROPORTO.RESERVA 
     set VALOR = random()*(5000-1500)+1500
  where cod_reserva is not null
  </code></pre>
  
  <p>but <code>random()</code> has double precision and i what my values like this: </p>
  
  <ul>
  <li>111,11</li>
  <li>222,22</li>
  </ul>
  
  <p>and <code>round()</code> doesn't use double precision.</p>
  
  <p>I've tried to change the data type of the field Valor but didn't worked. Tried numeric, monetary and float.</p>
  
  <p>I need to run a script that populates randomly this field with only 2 digits precision.</p>