NoSQL Databases

NoSQL databases have an edge over the conventional relational DBMS.
Some of them are:
1) One doesn't need to know the structure of data beforehand as it is with the RDBMS (requires a fixed schema). The format/data model can be changed anytime without affecting the application driven by the database.
2) Using Hadoop implementations in conjugation with NoSQL database, data could be stored across 1000s of servers( volumes of data which even the biggest RDBMS can't handle). This data can be processed and retrieved really fast.
3) NoSQL databases use clusters of cheap commodity servers to manage the exploding data and transaction volumes, while RDBMS tends to rely on expensive proprietary servers and storage systems.

Hi,
Glad to see that you are opting for the right technology at the right time. NoSQL is in high demand because of its structure and design and it goes perfectly with Big Data to quick integration with available API.
Mongo DB, AWS Dynamo DB and Google Cloud, Azure these are some well-known NoSQL services which will rule in the DB world without any doubts. I hope you are getting the scope and career progress in NoSQL. I would further advise getting familiar with basic RDBMS functions and designs which would help you to have a quick understanding of the differences between SQL and NoSQL. You may go through the below link to know more insights of mongodb.
http://e-gain.co.in/mongodb.php