“Data in the world started to grow tremendously after mobile application came in the market. This huge amount of data became almost impossible to handle with traditional relational database - SQL. NoSQL databases are introduced to handle those data where much more flexibility came like variable number of columns for each data. MongoDB is one of the leading NoSQL databases. Each collection contains a number of JSON documents. Any data model that can be expressed in a JSON document can be easily stored in MongoDB.
It is an unofficial and free MongoDB ebook created for educational purposes. All the content is extracted from Stack Overflow Documentation, which is written by many hardworking individuals at Stack Overflow.”