Lets talk about MongoDB. Well, it is a NoSQL database. Controversial topic these days. I should talk with a disclaimer.
NoSQL databases cannot and should not be compared with SQL database. It is like comparing Apples and Oranges. Imagine if you have a social media website, where you have data about users (members) — profile description, messaging history, pictures, videos, user generated content (status updates, etc…) .
In a pure SQL environment, you may use different databases and tables to store various types of data and perform an inner join or outer join depending upon what you need — seperate tables for user information, status updates, different method of storing pictures and videos. In the context of NoSQL, you may be able to horizontally scale the database in order to store everything under one roof. Imagine, each row (or each document) would represent record for one member that has fields for user information, status updates, images, blah blah blah… so the developer/data scientist does not have to do any more joins. Due to large generation of user and machine generated data, this may be a good option (as it can dynamically add schema – adding more fields in a record).
MongoDB is a document storage model based NoSQL, stores records in key:value pairs. Under MongoDB database, a table is a collection, row is called a document, column is a called a field. I am using MongoDB to store a bunch of JSON documents.
You may follow these instructions to setup as they are easy to clean up too.