Applications & Data · Databases
NoSQL
Non relational data stores optimised for scale, flexible schema or specialised access patterns.
IntermediateUpdated 2026-09-01
Overview
NoSQL covers document, key value, wide column, graph and time series engines. Most favour horizontal partitioning and eventual consistency, which is a deliberate trade for availability and scale under the constraints described by the CAP theorem.
Schema flexibility moves validation into the application. That accelerates development and, without discipline, produces data that is difficult to query or govern later.