Databases with Not Supported Foreign Keys


	Aerospike NoSQL AI-Assisted	2009	Document / XML, Key/Value, Vector	Not Supported	NoSQL AI-Assisted
	ArangoDB Multi-Model AI-Assisted	2011	Document / XML, Graph, Key/Value	Not Supported	Multi-Model AI-Assisted
	Atlas Time-Series AI-Assisted	2014	—	Not Supported	Time-Series AI-Assisted
	AtomicDB Failed Company	2011	Object-Oriented	Not Supported	Failed Company
BB	bbolt Forked Code Revival Project	2017	Key/Value	Not Supported	Forked Code Revival Project
	BoJack Abandoned	2016	Key/Value	Not Supported	Abandoned
	BoltDB Abandoned	2013	Key/Value	Not Supported	Abandoned
	chDB OLAP Acquired Company AI-Assisted	2023	Relational	Not Supported	OLAP Acquired Company AI-Assisted
	ClickHouse OLAP AI-Assisted	2016	Relational	Not Supported	OLAP AI-Assisted
	Cloud Datastore NoSQL	2013	Document / XML	Not Supported	NoSQL
	Couchbase NoSQL	2010	Key/Value, Document / XML	Not Supported	NoSQL
	CrateDB	2014	—	Not Supported
	Delta Lake AI-Assisted	2019	Column Family / Wide-Column	Not Supported	AI-Assisted
	DynamoDB OLTP NoSQL	2012	Document / XML, Key/Value	Not Supported	OLTP NoSQL
	FineDB Abandoned NoSQL	2013	Key/Value	Not Supported	Abandoned NoSQL
	FoundationDB Acquired Company OLTP AI-Assisted	2009	Key/Value	Not Supported	Acquired Company OLTP AI-Assisted
	Gel OLAP AI-Assisted	2018	Relational	Not Supported	OLAP AI-Assisted
	Geode Cache Forked Code OLTP NoSQL	2015	Key/Value	Not Supported	Cache Forked Code OLTP NoSQL
	GrapheekDB Abandoned	2014	Key/Value, Graph	Not Supported	Abandoned
	GrapheneDB Hosting Service	2012	Graph	Not Supported	Hosting Service
	GridGain	2007	Key/Value	Not Supported
	GUN Peer-to-Peer	2014	Graph	Not Supported	Peer-to-Peer
	Hadapt OLAP Acquired Company Middleware	2009	Relational	Not Supported	OLAP Acquired Company Middleware
	HerdDB	2016	Relational	Not Supported
	Heroic Abandoned	2015	Key/Value	Not Supported	Abandoned
	HStreamDB Streaming	2020	Relational	Not Supported	Streaming
	HyperDex Abandoned NoSQL	2011	Key/Value	Not Supported	Abandoned NoSQL
	Hypertable Acquired Company Abandoned	2008	Column Family / Wide-Column	Not Supported	Acquired Company Abandoned
	Ignite	2014	Key/Value	Not Supported
	InfluxDB Time-Series AI-Assisted	2013	Column Family / Wide-Column	Not Supported	Time-Series AI-Assisted
	Infobright OLAP Acquired Company	2005	Relational	Not Supported	OLAP Acquired Company
	IoTDB Time-Series AI-Assisted	2017	Hierarchical	Not Supported	Time-Series AI-Assisted
	Kudu OLTP	2016	Relational	Not Supported	OLTP
	KVdb NoSQL	2018	Key/Value	Not Supported	NoSQL
	Kyoto Cabinet	2009	Key/Value	Not Supported
	LedisDB Abandoned NoSQL	2014	Key/Value	Not Supported	Abandoned NoSQL
	LinDB	2019	Column Family / Wide-Column	Not Supported
	LucidDB OLAP Abandoned	2004	Relational	Not Supported	OLAP Abandoned
	Manticore Search Search Engine	2017	Relational	Not Supported	Search Engine
	Materialize Streaming AI-Assisted	2019	Relational	Not Supported	Streaming AI-Assisted
	Memgraph AI-Assisted	2016	Graph	Not Supported	AI-Assisted
	Nebula Graph	2018	Graph	Not Supported
	NeDB Abandoned	2013	Document / XML	Not Supported	Abandoned
	nessDB Abandoned	2011	Key/Value	Not Supported	Abandoned
	ObsessionDB OLAP Hosting Service	2024	Relational	Not Supported	OLAP Hosting Service
	OrbitDB Peer-to-Peer	2015	Document / XML, Key/Value	Not Supported	Peer-to-Peer
	Paper Abandoned NoSQL	2015	Key/Value, Object-Oriented	Not Supported	Abandoned NoSQL
	Pebble AI-Assisted	2018	Key/Value	Not Supported	AI-Assisted
	Pilosa Abandoned	2017	Vector	Not Supported	Abandoned
PN	PNUTS Abandoned OLTP NoSQL	2008	Key/Value	Not Supported	Abandoned OLTP NoSQL
	Pogreb MMAP	2018	Key/Value	Not Supported	MMAP
	PosDB OLAP	2017	Relational	Not Supported	OLAP
	PouchDB Web Browser NoSQL	2010	Document / XML	Not Supported	Web Browser NoSQL
	PrestoDB OLAP AI-Assisted	2013	Document / XML, Key/Value, Column Family / Wide-Column, Relational	Not Supported	OLAP AI-Assisted
	PumpkinDB Abandoned Immutable	2017	Key/Value	Not Supported	Abandoned Immutable
	QuestDB Time-Series AI-Assisted	2014	Relational	Not Supported	Time-Series AI-Assisted
	RavenDB MMAP NoSQL AI-Assisted	2009	Document / XML, Key/Value	Not Supported	MMAP NoSQL AI-Assisted
	Realm Acquired Company Abandoned Mobile	2011	Object-Oriented	Not Supported	Acquired Company Abandoned Mobile
	RedisGraph	2018	Graph	Not Supported
	ReductStore Time-Series AI-Assisted	2021	Key/Value	Not Supported	Time-Series AI-Assisted
	RisingLight	2021	Relational	Not Supported
	RisingWave Streaming AI-Assisted	2021	Relational	Not Supported	Streaming AI-Assisted
	SciDB OLAP	2008	Array / Matrix	Not Supported	OLAP
	Scylla NoSQL AI-Assisted	2014	Key/Value, Column Family / Wide-Column	Not Supported	NoSQL AI-Assisted
	SingleStore OLAP NewSQL Acquired Company OLTP	2011	Document / XML, Key/Value, Multi-Value, Object-Oriented, Relational, Vector	Not Supported	OLAP NewSQL Acquired Company OLTP
	Sled	2016	Key/Value	Not Supported
	Sqrrl Acquired Company NoSQL	2012	Graph, Key/Value	Not Supported	Acquired Company NoSQL
	SSDB Abandoned	2013	Key/Value	Not Supported	Abandoned
	SurrealDB Serverless Multi-Model AI-Assisted	2016	Document / XML, Graph, Relational	Not Supported	Serverless Multi-Model AI-Assisted
	SwayDB Abandoned	2018	Key/Value	Not Supported	Abandoned
	Tarantool	2008	Key/Value	Not Supported
	TDengine Time-Series AI-Assisted	2017	Relational	Not Supported	Time-Series AI-Assisted
	TDSQL	2012	Key/Value, Document / XML, Relational	Not Supported
	TileDB NoSQL	2014	Array / Matrix	Not Supported	NoSQL
	Tokyo Cabinet	2006	Key/Value	Not Supported
	TrailDB Abandoned	2014	Relational	Not Supported	Abandoned
	VanillaDB Abandoned	2016	Multi-Value	Not Supported	Abandoned
	Velox OLAP Query Engine AI-Assisted	2020	Relational	Not Supported	OLAP Query Engine AI-Assisted
	WiredTiger Acquired Company AI-Assisted	2008	Key/Value	Not Supported	Acquired Company AI-Assisted
	ZODB	2002	Object-Oriented	Not Supported