PostgreSQL

License(s):	PostgreSQL License License data reported from: PostgreSQL 9.0.4 (reviewed by OpenLogic)
Categories: Edit	Database, OracleDB alternative
Certification:	Certified, No Score Available
Homepage:	http://www.postgresql.org/
Language:	Java

The PostgreSQL project provides a relational database management system (RDBMS) that offers the following:

subqueries
views
foreign key constraints
stored procedures
triggers
support for the SQL standards
a query engine
multiversion concurrency control

Additionally, it can be extended in many ways by adding new data types, functions, index methods, and more.

PostgreSQL derives from the POSTGRES package written at the University of California at Berkeley. With over a decade of development behind it, it is one of the most advanced databases available anywhere, open source or otherwise.

For applications that require a full-featured open source relational database, this is the one to use.

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