You could before. The benefit of OLAP databases and other analytical engines is only partly due to the focus of the query languages. Storage format, and calcula

You could before. The benefit of OLAP databases and other analytical engines is only partly due to the focus of the query languages. Storage format, and calculation engine requirements are vastly different between OLTP and OLAP. While the constructs in the linked article increase the expressive power of SQL, they are more icing than cake for an OLAP load.