From Oracle’s web page: Oracle Big Data SQL extends Oracle SQL to Hadoop and NoSQL and the security of Oracle Database to all your data. It also includes a unique Smart Scan service that minimizes data movement and maximizes performance, by parsing and intelligently filtering data where it resides.
Oracle Big Data SQL seamlessly queries data across Oracle Database, Hadoop, and NoSQL sources and uses the full power of Oracle SQL to analyze all of your data. In terms of security, Big Data SQL extends Oracle Database security to Hadoop and NoSQL. It has full support for Cloudera Enterprise and Hortonworks distributions of Hadoop
Why Big Data SQL? There might be several answers, but among most important you will find the following: