NoSQL Databases

NoSQL databases refer to any database types that are not relational.

Relational database is the most popular database type nowadays. Structure Query Language (SQL) is a language to manage data in a relational database. This is why NoSQL is the term used to referred to non-relational databases.

Types of NoSQL Databases

Types of NoSQL Databases:

  • Key/value stores
  • Graph databases
  • Document stores

Key/value stores are key/value pairs.

Graph databases store data in graph format.

Document stores are similar to key/value stores, but the value is much more complex and it is in the form of a document, like XML or JSON


Examples of NoSQL Databases


MongoDB is a document store database.

Apache Giraph

Apache Giraph is a graph database.


External references

  • “CISSP Offical Study Guide: 9th Edition”, pp. 983; Chapple et al; Wiley, 2021.

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