Learn Mongodb From Mongodb
MongoDB is a document database with the scalability and flexibility that you want with the querying and indexing that you need.
Features:
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MongoDB stores data in flexible, JSON-like documents, meaning fields can vary from document to document and data structure can be changed over time
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The document model maps to the objects in your application code, making data easy to work with
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Indexing, and real time aggregation provide powerful ways to access and analyze your data
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MongoDB is a distributed database at its core, so high availability, horizontal scaling, and geographic distribution are built in and easy to use
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MongoDB is free and open-source.
Link here: MongoDB University