PostgreSQL

PostgreSQL is a powerful, open source object-relational database system.

It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness.

PostgreSQL features include:

• Runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows
• Referential integrity
• Fully ACID compliant
• Supports foreign keys, joins, views, triggers, and stored procedures (in multiple languages)
• It includes most SQL:2008 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP
• Supports storage of binary large objects, including pictures, sounds, or video
• Supports partitioning
• Supports tablespaces
• Schemas
• Online backup
• Point-in-time recovery
• Master-Slave replication
• Native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl, ODBC, among others
• GIS indexing
• Distributed database