I don't see why there's a competition. SQL is great for analytics. NoSQL is great for operations. When you want to do analytics on the data from your operations--which are presumably Big Data and far too much to pack into a single node--just query your Operations data using statistical sampling methods to generate a representative data set, stuff that "analytic snapshot" into any old RDBMS, and query it to your heart's content.

(And if they're not Big Data--well, then, the solution is even more obvious. :)