Non-relational (NoSQL) Database

A type of database that does not structure its data in tables or using fixed Schemas as in a Relational Database. The structure instead depend of the type of data stored and is often flexible to enable handling large volumes of unstructured data.

Data models

• Key-Value: stores data as unique keys and associated values.
• Document: stores data in formats like JSON or BSON.
• Column-family: Organises data into columns rather than rows, optimised for large-scale analytical queries.
• Graph: uses nodes and edges to represent and navigate complex relationships.

Examples

Key-value data model

{
  "100001": {
    "date": "01-01-2021",
    "content": "Welcome to this web application."
  },
  "100002": {
    "date": "02-01-2021",
    "content": "This is the first post on this web app."
  },
  "100003": {
    "date": "02-01-2021",
    "content": "Reminder: Tomorrow is the ..."
  }
}