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.
For ex
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 DatabasesNameLicensingDatabase TypeMongo DBOpen SourceDocument Oriented DatabaseCouch DBOpen SourceDocument Oriented DatabaseOrient DBOpen SourceGraph DatabaseNeo4JOpen Source /CommercialGraph DatabaseRedisOpen SourceKey Value StoreHbaseOpen SourceKey Value StoreVisualFoxProCommercialObject OrientedCacheCommercialObject Oriented