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Apache Arrow
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DataFrame
HDF5
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RCFile
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Custom
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Storage Organization
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Copy-on-Write / Shadow Paging
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Embedded
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User-Defined Functions
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Custom Language
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Materialized Views
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United States of America
Access
Accumulo
BoltDB
Caché
Cassandra
ClickHouse
CouchDB
DGraph
DataScript
Datomic
Db2
DynamoDB
EchoDB
Elasticsearch
FoundationDB
FoxPro
Greenplum
HBase
Hive
HyperSQL
Impala
InfluxDB
Informix
Kudu
LevelDB
LokiJS
MariaDB
Memcached
MongoDB
MySQL
Neo4j
Oracle RDBMS
Pinot
PostgreSQL
PrestoDB
Prometheus
Redis
Redshift
RocksDB
RxDB
SQL Server
SQLite
Sesame
Solr
Spark SQL
TiKV
ZODB
dBASE
BadgerDB
Berkeley DB
BoltDB
BuntDB
Cassandra
ClickHouse
Cloud BigTable
Cloud Spanner
CockroachDB
CouchDB
DataFusion
DuckDB
EchoDB
Elasticsearch
Event Store
ForestDB
FoundationDB
HBase
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Hive
HyperSQL
Kyoto Cabinet
LMDB
LedisDB
LevelDB
LokiJS
Lucene
MariaDB
MongoDB
MySQL
OrbitDB
Pebble
PostgreSQL
PouchDB
Redis
RocksDB
SQL Anywhere
SQL Server
SQLite
Scylla
Shore
Sled
Solr
Sophia
Spark SQL
Tantivy
TiKV
Tokyo Cabinet
VanillaDB
WiredTiger
Zookeeper
bbolt
etcd
Accumulo
Adabas
Adaptive Server Enterprise
AgateDB
AgensGraph
AlaSQL
BoltDB
Btrieve
Cassandra
Citus
ClickHouse
Cloud BigTable
Coherence
CouchDB
DGraph
DataScript
Db2
Derby
Doris
Elasticsearch
FASTER
FastDB
FoxPro
GemFire
GigaBASE
Greenplum
GridGain
H-Store
H2
HAWQ
HBase
Hazelcast
Hive
HyperSQL
Impala
Informix
Ingres
InterBase
KairosDB
Kubl
Kudu
LMDB
LevelDB
LokiJS
MapDB
MariaDB
MaxDB
Memcached
MonetDB
MongoDB
MySQL
NDB Cluster
Neo4j
Noms
NonStop SQL
OSIsoft PI
OrientDB
P*TIME
ParAccel
Percona Server
Pilosa
PostgreSQL
PrestoDB
Redis
RedisGraph
Riak
RocksDB
SQL Anywhere
SQL Server
SQLite
Sesame
Shore
Solr
Spark SQL
Sphinx
System R
TiDB
TiKV
TileDB
Titan
Tokyo Cabinet
Tokyo Tyrant
Trafodion
Umbra
Vearch
Vitess
cdb
ksqlDB
ArangoDB
Aurora
Berkeley DB
BigQuery
Bitcask
C-Store
Calvin
Cassandra
Chroma
ClickHouse
Cloud BigTable
Cloud Spanner
CouchDB
DataScript
Datomic
DuckDB
DynamoDB
Elasticsearch
FASTER
GUN
HBase
HeavyDB
Hekaton
HyPer
Hypertable
Impala
InfluxDB
Kdb+
Kinetica
LMDB
LeanStore
LevelDB
Lucene
MariaDB
Model 204
MonetDB
MongoDB
MySQL
Neo4j
Ocelot
OrientDB
Pinot
Prometheus
Raima Database Manager
Redis
Riak
RocksDB
SQLite
SSDB
SciDB
Scylla
Silo
Sphinx
System R
TinyDB
Titan
Titan
Tokyo Cabinet
XTDB
etcd
AIX
All OS with Java VM
Android
BSD
CP/M
DOS
Hosted
HP-UX
Illumos
iOS
Linux
NeXTSTEP
OpenVMS
OS X
QNX
Solaris
UnixWare
VxWorks
Windows
z/OS
ActionScript
Assembly
Bash
C
C#
C++
Clojure
COBOL
Cocoa
Crystal
D
Dart
Delphi
Eiffel
Elixir
Erlang
F#
Fancy
Go
Groovy
Haskell
Haxe
Io
Java
JavaScript
Julia
KL1
Kotlin
Lisp
Lua
Matlab
Nim
Objective-C
Ocaml
Pascal
Perl
PHP
PL/SQL
Prolog
Proprietary
Python
R
Racket
Rebol
Ruby
Rust
Scala
Scheme
Skip
Smalltalk
Solidity
SQL
Swift
Tcl
TypeScript
V
VCL
Visual Basic
Zig
Abandoned Project
Acquired Company
Blockchain
Cache
Failed Company
Forked Code
Immutable
Middleware
MMAP
Mobile
Nearest Neighbor Search
NewSQL
NoSQL
OLAP
OLTP
Parody / Joke
Peer-to-Peer
Query Engine
Search Engine
Serverless
Streaming
Time-Series
Versioning
Web Browser
xBase
Academic
Commercial
Educational
Hobby
Industrial Research
Internal / Non-Public
Open Source
AGPL v3
Apache v2
Boost Software License
BSD
Business Source License
Code Project Open License
Commons Clause License
Confluent Community License
Creative Commons License
Eclipse Public License
Elastic License v2
Fair Source License
Functional Source License
GPL v2
GPL v3
ISC License
LGPL v2
LGPL v3
Microsoft Reference Source License
MIT
Mozilla Public License
Mulan PubL v2
OpenLDAP Public License
Open Software License 3.0
Parity Public License
PostgreSQL License
Proprietary
Public Domain
Python License
Server Side Public License
VoltDB Proprietary License
Zope Public License
Blocking
Consistent
Fuzzy
Non-Blocking
Not Supported
Bitmap Encoding
Bit Packing / Mostly Encoding
Delta Encoding
Dictionary Encoding
Incremental Encoding
Naïve (Page-Level)
Naïve (Record-Level)
Null Suppression
Prefix Compression
Run-Length Encoding
Deterministic Concurrency Control
Multi-version Concurrency Control (MVCC)
Not Supported
Optimistic Concurrency Control (OCC)
Timestamp Ordering
Two-Phase Locking (Deadlock Detection)
Two-Phase Locking (Deadlock Prevention)
Centralized Coordinator
Conflict-Free Replicated Data Type (CRDT)
Decentralized
Array / Matrix
Column Family / Wide-Column
Document / XML
Entity-Attribute-Value
Entity-Relationship
Graph
Hierarchical
Key/Value
Multi-Value
Network
Object-Oriented
Object-Relational
Relational
Triplestore / RDF
Vector
Asynchronous Replication
Conflict Resolution
Quorum-based Replication
Read Repair
Synchronous Replication
Not Supported
Supported
Custom
FPGA
GPU
RDMA
Adaptive Radix Tree (ART)
AVL-Tree
B-epsilon Tree
BitMap
Block Range Index (BRIN)
B+Tree
Bw-Tree
Hash Table
Hierarchical Navigable Small World (HNSW)
Inverted Index (Full Text)
K-D Tree
Log-Structured Merge Tree
MassTree
Not Supported
Patricia/Radix Trie
Red-Black Tree
R-Tree
Skip List
T-Tree
Cursor Stability
Not Supported
Read Committed
Read Stability
Read Uncommitted
Repeatable Read
Serializable
Snapshot Isolation
Broadcast Join
Hash Join
Index Nested Loop Join
Nested Loop Join
Not Supported
Semi Join
Shuffle Join
Sort-Merge Join
Worst-Case Optimal Join
Command Logging
Logical Logging
Not Supported
Physical Logging
Physiological Logging
Shadow Paging
Bushy
Inter-Operator (Vertical)
Intra-Operator (Horizontal)
Code Generation
JIT Compilation
Not Supported
Stored Procedure Compilation
Materialized Model
Tuple-at-a-Time Model
Vectorized Model
Command-line / Shell
Custom API
Cypher
Datalog
GraphQL
Gremlin
HTTP / REST
PartiQL
PL/SQL
PromQL
QUEL
RDFS++
RPC
SPARQL
SQL
Stored Procedures
XPath
XQuery
Disk-oriented
Hybrid
In-Memory
Apache Arrow
Apache Avro
Apache CarbonData
Apache Hudi
Apache Iceberg
Apache ORC
Apache Parquet
CSV
Custom
DataFrame
HDF5
N-Triples
RCFile
SequenceFile
Trevni
Custom
Decomposition Storage Model (Columnar)
Hybrid
N-ary Storage Model (Row/Record)
Copy-on-Write / Shadow Paging
Heaps
Indexed Sequential Access Method (ISAM)
Log-structured
Sorted Files
Not Supported
Supported
Embedded
Shared-Disk
Shared-Everything
Shared-Memory
Shared-Nothing
Custom Language
Java
Javascript
Perl
PHP
PL/SQL
Python
R
Ruby
Rust
TCL
T-SQL
Materialized Views
Not Supported
Virtual Views