Database without SQL is new trend came up on 21 Century, widely used by Big Data and in application where we handle a massive amount of real time data. No SQL become famous mainly for the flexibility it gives in data structure design from the traditional relation database model.
Any changes in databases are propagated to all the nodes typically in milliseconds.
NoSQL also includes some low level query languages. NoSQL databases are flexible, quick to implement and much quicker performance.
Top No SQL Databases