Relational database model has been co-existing with us for around a quarter of a century -so much time, right?-, but a new class of database has emerged in the enterprise. I’m talking about NoSQL.
NoSQL, also known as “non-relational” or “cloud”, is a broad class of database management system with significant differences from a classic relational database management system (RDBMS). The stored data not require fixed table schemas. It usually avoids join operations and typically scale horizontally.