Comparison of object–relational database management systems

This is a comparison of object–relational database management systems. 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.

Object features

Information about what fundamental ORDBMSes features are implemented natively.

Information about what data types are implemented natively.