Full Stack Python

# NoSQL Data Stores

Relational databases store the vast majority of web application persistent data. However, there are several alternative classifications of storage representations.

1. Key-value pair
2. Document-oriented
3. Column-family table
4. Graph

These persistent data storage representations are commonly used to augment, rather than completely replace, relational databases.

## Document-Oriented

A document-oriented database provides a semi-structured representation for nested data.

## Key-Value Pair

Key-value pair data stores are based on hash map data structures.

## Graph

A graph database represent and store data in three aspects: nodes, edges, and properties.

A node is an entity, such as a person or business.

An edge is the relationship between two entities. For example, an edge could represent that a node for a person entity is an employee of a business entity.

A property represents information about nodes. For example, an entity representing a person could have a property of "female" or "male".

Neo4j is one of the most widely used graph databases and runs on the Java Virtual Machine stack.

### NoSQL third-party services

MongoHQ provides MongoDB as a service. It's easy to set up with either a standard LAMP stack or on Heroku.

### NoSQL data stores resources

NoSQL Weekly is a free curated email newsletter that aggregates articles, tutorials, and videos about non-relational data stores.

NoSQL comparison is a large list of popular, BigTable-based, special purpose, and other datastores with attributes and the best use cases for each one.

Next read the about section.