It is important to distinguish between information and intelligence. NoSQL is more convenient for storing and keeping the information. However, it is faster and less complex to work with SQL database to get intelligence; i.e. extract useful meaning out of information.
http://www.forbes.com/sites/oracle/2014/09/08/as-big-data-booms-sql-makes-a-comeback/
http://www.forbes.com/sites/oracle/2014/09/08/as-big-data-booms-sql-makes-a-comeback/