NoSQL

A NoSQL system propose a different architecture than the one based on tables, found in rdbms

It is used to propose solution to manage issues related to the big data and real-time web applications.

Main characteristics

• Open-source
• Design to work on cluster of machines.
• Don’t rely on relational model, schema or structure
• Not-Only SQL. Supports SQL-like languages, but usually relies on other ones.
• Follow the BASE properties
• Horizontal scalability (scale out)

Aggregate

An aggregate collection of related objects are treated as an unit

• Suitable for clusters
• Atomicity guaranteed

// User and products are related,
// the result of the query is merged
{
  "user": {
    "name": "Alice",
    "products": [
      {
        "id": 1,
        "name": "Laptop"
      },
      {
        "id": 2,
        "name": "Smartphone"
      }     
    ]
  }
}