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The following is a list of object-relational database management systems.
- DB2
- GigaBASE [1]
- Informix
- Intersystems Cache [2]
- Oracle
- OpenLink Virtuoso
- UniSQL [3]
- Sybase
- Valentina [4]
- VMDS
- PostgreSQL
The following tables compare general and technical information for a number of object-relational database management systems. Please see the individual products' articles for further information. This article is not all-inclusive or necessarily up-to-date. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.
Fundamental features
Information about what fundamental ORDBMSes features are implemented natively.
| Type | Method | Type inheritance | Table inheritance | |
|---|---|---|---|---|
| Oracle | Yes | Yes[1] | Yes | No |
| OpenLink Virtuoso | Yes | No | Yes | Yes |
| PostgreSQL | Yes | No | No | Yes |
| Type | Method | Type inheritance | Table inheritance |
Notes:
- ^ No private methods, no way to call super method from a child.
Data types
Information about what data types are implemented natively.
| Array | List | Set | Multiset | Object reference | |
|---|---|---|---|---|---|
| Oracle | Yes | No | Yes | Yes | Yes |
| OpenLink Virtuoso | Yes | No | No | No | Yes |
| PostgreSQL | Yes | No | No | No | No |
| Array | List | Set | Multiset | Object reference |