# List of relational database management systems

This is a list of relational database management systems.

## List of software

List of Relational Database Management Systems (Alphabetical Order) :
| Name | License |
| 4th Dimension | Proprietary |
| Access Database Engine (formerly known as Jet Database Engine) | Proprietary |
| Actian Zen (PSQL) (formerly known as Pervasive PSQL) | Proprietary |
| Adabas D | Proprietary |
| Airtable | Proprietary |
| Altibase | Proprietary |
| Amazon Aurora | Proprietary |
| Apache Derby | Apache License 2.0 |
| Apache Ignite | Apache License 2.0 |
| Aster Data Systems | Proprietary |
| CA Datacom | Proprietary |
| CA IDMS | Proprietary |
| Clarion | Proprietary |
| ClickHouse | Apache License 2.0 |
| Clustrix | Proprietary |
| CockroachDB | Proprietary |
| CSQL | Proprietary |
| CUBRID | Apache, BSD |
| DataEase | Proprietary |
| DataFlex | Proprietary |
| Dataphor | Proprietary |
| dBase | Proprietary |
| Derby (aka Java DB) | Apache License 2.0 |
| DuckDB | MIT |
| Empress Embedded Database | Proprietary |
| EnterpriseDB | Proprietary |
| eXtremeDB | Proprietary |
| Exasol | Proprietary |
| Extensible Storage Engine | Proprietary |
| FileMaker Pro | Proprietary |
| Firebird | MPL/GPL/LGPL |
| FoundationDB | Apache License 2.0 |
| FrontBase | Proprietary |
| Greenplum | Apache License 2.0 |
| H2 | MPL/GPL/LGPL |
| Helix | Proprietary |
| HSQLDB | BSD |
| IBM Db2 | Proprietary |
| IBM Lotus Approach | Proprietary |
| Infobright | GPL |
| Informix | Proprietary |
| Ingres | GPL |
| InterBase | Proprietary |
| InterSystems Caché | Proprietary |
| InterSystems IRIS Data Platform | Proprietary |
| Linter SQL RDBMS | Proprietary |
| MariaDB | GPL |
| MaxDB | Proprietary |
| Microsoft SQL Server | Proprietary |
| Microsoft SQL Server Express | Proprietary |
| Microsoft Visual FoxPro | Proprietary |
| Mimer SQL | Proprietary |
| MonetDB | MPL/GPL/LGPL |
| mSQL | GPL |
| MySQL | GPL |
| Netezza | Proprietary |
| NexusDB | Proprietary |
| NonStop SQL | Proprietary |
| NuoDB | Proprietary |
| Omnis Studio | Proprietary |
| OpenLink Virtuoso (Open Source Edition) | GPL |
| OpenLink Virtuoso Universal Server | Proprietary |
| Oracle | Proprietary |
| Oracle Rdb for OpenVMS | Proprietary |
| Panorama | Proprietary |
| Paradox | Proprietary |
| Percona Server for MySQL | GPL |
| Percona XtraDB Cluster | GPL |
| Polyhedra | Proprietary |
| PostgreSQL | PostgreSQL License |
| Postgres Plus Advanced Server | Proprietary |
| Progress Software | Proprietary |
| R:Base | Proprietary |
| RethinkDB | Apache License 2.0 |
| SAND CDBMS | Proprietary |
| SAP HANA | Proprietary |
| SAP Adaptive Server Enterprise | Proprietary |
| SAP IQ (formerly known as Sybase IQ) | Proprietary |
| SingleStore | Proprietary |
| Snowflake Cloud Data Warehouse | Proprietary |
| solidDB | Proprietary |
| SQL Anywhere (formerly known as Sybase Adaptive Server Anywhere and Watcom SQL) | Proprietary |
| SQL Azure (Cloud SQL Server) | Proprietary |
| SQLBase | Proprietary |
| SQLite | Public Domain |
| SQream DB | Proprietary |
| SAP Advantage Database Server (formerly known as Sybase Advantage Database Server) | Proprietary |
| Teradata | Proprietary |
| TiDB | Apache License 2.0 |
| TimesTen | Proprietary |
| Trafodion | Apache License 2.0 |
| Transbase | Proprietary |
| Unisys RDMS 2200 | Proprietary |
| UniData | Proprietary |
| UniVerse | Proprietary |
| Vectorwise | Proprietary |
| Vertica | Proprietary |
| VoltDB | Proprietary |
| YugabyteDB | Apache License 2.0 |
* Proprietary
* Open source

### Front-end User interfaces Only

* Apache OpenOffice Base
** HSQLDB
* LibreOffice Base
** Firebird
** HSQLDB
* Microsoft Access
** Access Database Engine

## Discontinued

* Britton Lee IDMs
* Cornerstone
* DM/BasisPlus
* Google Fusion Tables
* IBM Business System 12
* IBM System R
* MICRO Relational Database Management System
* Pick
* PRTV
* QBE
* IBM SQL/DS
* Sybase SQL Server

### Front-end User interfaces Only

* OpenOffice.org Base
** HSQLDB
* StarBase
** Adabas D

## Relational by the Date–Darwen–Pascal Model
### Current

* Alphora Dataphor (a proprietary virtual, federated DBMS and RAD MS .Net IDE).

### Obsolete

* IBM Business System 12
* IBM IS1
* IBM PRTV (ISBL)
* Multics Relational Data Store