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Advantage of MongoDB

Advantage of MongoDB 
In MongoDB there is no concept of the relationship while RDBMS has a typical schema design that shows all tables and the relationship between these tables. On enterprise level relational database face more difficulty due to accessing of records, performance etc.  Below I am trying to explain the advantage of MongoDB over RDBMS.
Advantages of MongoDB in excess of RDBMS
  • Schema-less: A collection can hold more than one document with different structure means a number of fields, content size of the document can be different to one another.  See below pic.



A person is a collection which has two documents with different structure first document did not have field middleName while second have.
  • It has cleared Structure of a single object.
  • No complex joins
  • Deep query-ability:  MongoDB supports dynamic queries on documents using a document-based query language that's nearly as powerful as SQL
  • Ease of scale-out: MongoDB is easy to scale
  • Conversion / mapping of application objects to database objects not needed
  • Uses internal memory for storing the (windowed) working set, enabling faster access to data
  • No schema migrations: Since MongoDB is schema-free, your code defines your schema.
Why should use MongoDB
  • Document Oriented Storage: Data is stored in the form of JSON style documents
  • Index on any attribute
  • Replication & High Availability
  • Auto-Sharding
  • Rich Queries
  • Fast In-Place Updates
Where should use MongoDB?
  • Big Data
  • Content Management and Delivery
  • Mobile and Social Infrastructure
  • User Data Management
  • Data Hub

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