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Database

Relational and document databases — data modelling, query optimisation, and scaling.

2 Database guides — updated for 2026

PostgreSQL

v17 · Intermediate

The world's most advanced open source relational database

SQLRDBMSACIDJSON

IntermediateView Guide →

MongoDB

v8.0 · Intermediate

The developer data platform

NoSQLDocument DBAtlasAggregation

IntermediateView Guide →

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