Knowledge Sharing

MongoDB is a document database which belongs to a family of databases called NoSQL - not only SQL. In MongoDB, records are documents which behave a lot like JSON objects in JavaScript. Values in documents can be looked up by their field’s key. Documents can have some fields/keys and not others, which makes Mongo extremely flexible. Features Relational (SQL) Non-Relational (NoSQL) Data Type Hard to store rich data type Able to store literally any type of data Scaling Not trivial to scale, and not cheap Scaling is automatic and transparent Cost Expensive to build and maintain Around 10% cost to Relational DB Representation Represents data in tables and rows Represents data as collections of JSON documents Query Structured Query Language (SQL): makes SQL injection attack possible Object Querying: intuitive, passing a document to explain what you're querying for Multi-originated JOIN operation: perform query across multiple tables Multi-dimensional data type: support...