Comparison of object–relational database management systems
# Comparison of object–relational database management systems

This is a comparison of object–relational database management systems (ORDBMSs). Each system has at least some features of an object–relational database; they vary widely in their completeness and the approaches taken.

The following tables compare general and technical information; please see the individual products' articles for further information. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.

## Basic data

| Name | Vendor | License | OS | Notes |
| - | - | - | - | - |
| Adaptive Server Enterprise | SAP | Proprietary | Cross-platform | |
| Caché | InterSystems | Proprietary | Cross-platform | |
| CUBRID | NHN Corporation | GPL/BSD | Linux, Windows | |
| IBM Db2 | IBM | Proprietary | Cross-platform | |
| GigaSpaces | GigaSpaces | Apache-2.0 or Proprietary | Cross-platform | |
| Greenplum Database | Greenplum division of EMC Corporation | Proprietary | ? | Uses PostgreSQL codebase |
| Informix | IBM | Proprietary | Cross-platform | |
| Microsoft SQL Server | Microsoft Corporation | Proprietary | Windows, Linux | Supports data objects in .NET languages |
| OpenEdge Advanced Business Language (formerly Progress 4GL) | Progress Software Corporation | Proprietary | Cross-platform | |
| Oracle Database | Oracle Corporation | Proprietary | Linux, Windows, Unix | |
| PostgreSQL | PostgreSQL Global Development Group | PostgreSQL License | Cross-platform | |
| Virtuoso Universal Server | OpenLink Software | GPLv2 or proprietary | Cross-platform | |
| VMDS (Version Managed Data Store) | GE Energy, a division of General Electric | Proprietary | ? | GIS for public utilities; can be stored inside Oracle Database |
| WakandaDB | 4th Dimension | AGPLv3 or proprietary | Windows, Linux, macOS | Based on REST and server-side JavaScript |
| XDB Enterprise Server | Micro Focus | Proprietary | DOS, Windows NT, OS/2 | |
| YugabyteDB | Yugabyte | Apache 2.0 | Linux | |
| Zope Object Database | Zope Corporation | Zope Public License | Cross-platform | For Python, also included in Zope web application server |

## Object features

Information about what fundamental ORDBMSes features are implemented natively.

| | Type | Method | Type inheritance | Table inheritance |
| - | - | - | - | - |
| CUBRID | Yes | Yes | Yes | Yes |
| Oracle | Yes | Yes | Yes | Yes |
| OpenLink Virtuoso | Yes | Yes | Yes | Yes |
| PostgreSQL | Yes | Yes | Yes | Yes |
| Informix | Yes | Yes | Yes | Yes |
| WakandaDB | Yes | Yes | Yes | Yes |

## Data types

Information about what data types are implemented natively.

| | Array | List | Set | Multiset | Object reference |
| - | - | - | - | - | - |
| CUBRID | Yes | Yes | Yes | Yes | Yes |
| Oracle | Yes | Yes | Yes | Yes | Yes |
| OpenLink Virtuoso | Yes | Yes | Yes | Yes | Yes |
| PostgreSQL | Yes | Yes | Yes | Yes | Yes |
| Informix | No | Yes | Yes | Yes | Yes |
