Vector Database
A database optimized for storing and querying high-dimensional vectors. Powers AI applications like semantic search and recommendation systems.
What is Vector Database?
A database optimized for storing and querying high-dimensional vectors. Powers AI applications like semantic search and recommendation systems.
Vector Database is a advanced concept that sits in the Distributed Systems Core area of system design. Engineers reach for it whenever they need to reason about real-world trade-offs in that space — not just for textbook correctness, but because real production systems at companies like Netflix, Amazon, and Google make these decisions every day.
If you want to go deeper than this definition — with diagrams, code, and a quiz to lock it in — work through the "Vector Database" lesson linked below. It walks through the why, the mechanism, the trade-offs, and how the giants actually use it in production.
Learn Vector Database in depth
Full interactive lesson with diagrams, code examples, real-world references, and a quiz.
Open the Vector Database lessonRelated lessons
Lessons that touch on Vector Database as part of a larger topic.
Vector Database
Databases built for AI, storing and searching high-dimensional embeddings that power semantic search, RAG, and recommendation engines
intermediate · database types storage
Design a RAG System at Scale
Design a production Retrieval-Augmented Generation system - vector databases, chunking strategies, retrieval pipelines, reranking, hybrid search, caching, evaluation, and cost management
capstone · capstone
Embedding Storage
How to efficiently store, manage, and serve high-dimensional embedding vectors at scale
intermediate · database types storage
See also
Related glossary terms you might want to look up next.
NoSQL
Databases that don't use traditional table-based relational models. Includes document stores, key-value, graph, and column-family databases.
Database
An organized collection of data that can be easily accessed, managed, and updated. The backbone of almost every application.
Index
A data structure that speeds up database lookups. Like the index at the back of a book that lets you jump to the right page instead of reading every page.