What is NoSQL database?
The name NoSQL itself tells us that it is "non-SQL" or "non-relational" database. Around 30 years back when the data used to be non-changing and smaller in size, traditional relational databases were more prominent like ORACLE, Postgres and so on which had fixed schemas. But during the last decade, the data has grown exponentially and it is also changing quickly. The traditional databases have failed to handle this BIG DATA effectively. So there was a need to introduce the database that can adapt itself with ever-changing data and that can handle the enormous size of data. And thus NoSQL databases came into the picture. Nowadays NoSQL databases have been referred to as "Not Only SQL" databases which means that these databases may support SQL like query languages and can be a part of polygot persistent architecture along with other relational databases. The data structures used in the NoSQL database are more efficient than the data structures used by