title: Show in just one row all records that have the same id.
body: <p>Lets say I have a table of product price history, which is the price and product id, with the following records: </p>
  
  <pre><code>id   price 
  
  1     23     
  2     14    
  2     23      
  2     20  
  3     30  
  3     40 
  </code></pre>
  
  <p>what I want is to show the data grouped by id, showing the prices at which has been sold each product. </p>
  
  <p>What i expectis something like this: </p>
  
  <pre><code>id   priceA PriceB PriceC
  
  1    23     NULL   NULL        
  2    14     23     20     
  3    30     40     NULL     
  </code></pre>