title: Multiple currency orderBy query
body: <p>How can I do a <code>SELECT</code> with an <code>ORDER BY item.price ASC</code> condition on a multiple currency database table?</p>
  
  <p>I'm not sure if it is possible.</p>
  
  <p>Item table has <code>price, currency</code> properties with a lot of  currencies of all types.</p>