NoSQL Database Management System

A NoSQL database management system stores and retrieves data using a model other than the tables of rows and columns a relational database requires, commonly key-value pairs, wide columns, documents or graphs, and typically without one fixed schema enforced across every record. Dropping strict relational structure, and in many designs strict transactional consistency, lets a NoSQL system scale across many commodity servers and absorb large, fast changing or loosely structured data more readily than a traditional relational engine usually can. The term, short for not only SQL, covers a broad family of systems that spread from the early 2000s onward, driven largely by the data volumes and availability needs of large web and social platforms, and many such systems still support SQL-like query languages alongside their own native interfaces.