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. It supports a large part of the SQL standard and offers many modern features:
Also, PostgreSQL™ can be extended by the user in many ways, for example by adding new
And because of the liberal license, PostgreSQL™ can be used, modified, and distributed by anyone free of charge for any purpose, be it private, commercial, or academic.