Comparison of object-relational database management systems

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The following is a list of object-relational database management systems.

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	YesNo private methods, no way to call super method from a child.	Yes	No
OpenLink Virtuoso	Yes	No	Yes	Yes
PostgreSQL	Yes	No	No	Yes
	Type	Method	Type inheritance	Table inheritance

Notes:

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

External links

[Comparison of different SQL implementations]

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