The Economics: NoSQL vs "New SQL" vs Relational Databases

Economics are a big deal when deciding whether to go with a NoSQL, NewSQL [http://blogs.the451group.com/information_management/2011/04/06/what-we-talk-about-when-we-talk-about-newsql/] , MPP DBMS, or traditional RDBMS. Many of the products  (in all four of these categories) claim…