PostgreSQL 8.2.0 review

PostgreSQL is a highly-scalable, SQL compliant, open source object-relational database management system

License: BSD License File size: 14K Developer: PostgreSQL Global Development Group

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PostgreSQL is a highly-scalable, SQL compliant, open source object-relational database management system. With more than 15 years of development history, it is quickly becoming the de facto database for enterprise level open source solutions.

PostgreSQL is an object-relational database management system (ORDBMS) based on POSTGRES, Version 4.2, developed at the University of California at Berkeley Computer Science Department. POSTGRES pioneered many concepts that only became available in some commercial database systems much later.

PostgreSQL is an open-source descendant of this original Berkeley code. PostgreSQL supports SQL92 and SQL99.

Here are some key features of "PostgreSQL":
complex queries
foreign keys
triggers
views
transactional integrity
multiversion concurrency control

Additionally, PostgreSQL can be extended by the user in many ways, for example by adding new:
data types
functions
operators
aggregate functions
index methods
procedural languages

And because of the liberal license, PostgreSQL can be used, modified, and distributed by everyone free of charge for any purpose, be it private, commercial, or academic.