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Databases & SQL vocabulary · NoSQL Databases

Key-value store

Meaning in databases & SQL, with examples

nounCommon term

In databases & SQL, key-value store means: The simplest kind of NoSQL database, which saves each value under a unique key and finds it again very quickly by that key.

In Turkish: anahtar-değer deposu, anahtar-değer veritabanı

How it is used

Redis, Memcached, etcd and Amazon DynamoDB are typical examples. Key-value stores are used for caches, user sessions, counters, feature flags and rate limits. You 'get' and 'set' keys and often give them an expiry time (TTL).

Example sentences

  1. Session data lives in a key-value store, so any web server can read it.

  2. A key-value store is fast, but you can't run complex queries on it.

Common collocations

  • key-value store
  • key-value pair
  • set a key
  • key expiry
  • TTL
  • NoSQLA broad group of databases that do not use the classic table-and-SQL model, storing data as documents, key-value pairs, wide columns or graphs instead.
  • in-memory databaseA database that keeps its data mainly in RAM rather than on disk, so reads and writes are extremely fast.
  • cacheA fast storage layer that keeps copies of frequently used data or query results so that they can be returned without asking the database again.
  • document databaseA NoSQL database that stores each item as a self-contained document, usually in a JSON-like format, so related data can be kept together without fixed tables.

This word in other fields

The same English word can have a different meaning in another field:

More terms: NoSQL Databases

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