PostgreSQL is a powerful open source object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability feature robustness and performance.PostgreSQL is the default database on Mac OS X Server and is also available for Windows and Linux.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. It is fully ACID compliant has full support for foreign keys joins views triggers and stored procedures (in multiple languages). It also supports materialized views transaction-level snapshots and write-ahead logging for increased security. PostgreSQL has native programming interfaces for C/C++ Java .Net Perl Python Ruby Tcl ODBC among others.PostgreSQL is a free and open source relational database management system (RDBMS) emphasizing extensibility and technical standards compliance. It is designed to handle a range of workloads from single machines to data warehouses or Web services with many concurrent users. It has many advanced features including reliable transactions and concurrency without read locks atomic multi-versioning online/hot backup capability tablespaces asynchronous replication nested transactions (savepoints) geospatial data support for PostGIS and more.