A key–value database, or key–value store, is a data storage paradigm designed for storing, retrieving, and managing associative arrays, and a data structure...

A name–value pair, also called an attribute–value pair, key–value pair, or field–value pair, is a fundamental data representation in computing systems...

source-available, in-memory storage, used as a distributed, in-memory key–value database, cache and message broker, with optional durability. Because it holds...

An Ordered Key-Value Store (OKVS) is a type of data storage paradigm that can support multi-model database. An OKVS is an ordered mapping of bytes to...

software portal Lightning Memory-Mapped Database (LMDB) is an embedded transactional database in the form of a key-value store. LMDB is written in C with API...

rapid traversal. Document-oriented databases are inherently a subclass of the key-value store, another NoSQL database concept. The difference[contradictory]...

Oracle NoSQL Database is a NoSQL-type distributed key-value database from Oracle Corporation. It provides transactional semantics for data manipulation...

an open-source in-memory storage, used as a distributed, in-memory key–value database, cache and message broker, with optional durability. Because it holds...

an abstract data type that stores a collection of (key, value) pairs, such that each possible key appears at most once in the collection. In mathematical...

in-memory cache database. Aerospike offers Key-Value, JSON Document, and Graph data models. Aerospike is open source distributed NoSQL database management...

proprietary NoSQL database offered by Amazon.com as part of the Amazon Web Services portfolio. DynamoDB offers a fast persistent key–value datastore with...

managing key-value databases. Tokyo Cabinet was sponsored by the Japanese social networking site Mixi, and was a multithreaded embedded database manager...

Berkeley DB (BDB) is an embedded database software library for key/value data, historically significant in open source software. Berkeley DB is written...

DBM is a library and file format providing fast, single-keyed access to data. A key-value database from the original Unix, dbm is an early example of a NoSQL...

Database (LMDB) from Symas Corp. Mimer SQL MonetDB Embedded solidDB SQLite SQL Server Compact from Microsoft Corporation Sophia Embeddable key-value storage...

Memcached value with the unique key "userrow:userid" exists, where userid is some number. If the result does not exist, it would select from the database as...

NoSQL databases (e.g. key–value pair, wide column, graph, or document) are different from those used by default in relational databases, making some operations...

RocksDB is a high performance embedded database for key-value data. It is a fork of Google's LevelDB optimized to exploit multi-core processors (CPUs)...

A surrogate key (or synthetic key, pseudokey, entity identifier, factless key, or technical key[citation needed]) in a database is a unique identifier...

database system developed by ArangoDB Inc. ArangoDB is a multi-model database system since it supports three data models (graphs, JSON documents, key/value)...

A candidate key, or simply a key, of a relational database is any set of columns that have a unique combination of values in each row, with the additional...

tolerance, NoSQL databases became prominent after 2009. NoSQL databases use a variety of data models, with document, graph, and key–value models being popular...

primary key (PK) for each row in a table. When a new row is written to the table, a new unique value for the primary key is generated; this is the key that...

an Erlang application that provides an API for storing and retrieving key/value data into a log-structured hash table. The design owes a lot to the principles...

time series database is a software system that is optimized for storing and serving time series through associated pairs of time(s) and value(s). In some...

MUMPS is a high performance transaction processing key–value database with integrated programming language. MUMPS allows multiple commands to appear on...

referenced value must exist. For referential integrity to hold in a relational database, any column in a base table that is declared a foreign key can only...

of relational databases, a foreign key is subject to an inclusion dependency constraint that the tuples consisting of the foreign key attributes in one...

LevelDB is an open-source on-disk key-value store written by Google fellows Jeffrey Dean and Sanjay Ghemawat. Inspired by Bigtable, LevelDB source code...

index in database is most commonly used index in data management. It is created on a column that contains unique values, such as a primary key or email...