PostgreSQL Free Download

PostgreSQLOverview

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 includes most SQL:2008 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP.

NEW

# Major enhancements in PostgreSQL 9.4 include:

- Add jsonb, a more capable and efficient data type for storing JSON data
- Add new SQL command ALTER SYSTEM for changing postgresql.conf configuration file entries
- Reduce lock strength for some ALTER TABLE commands
- Allow materialized views to be refreshed without blocking concurrent reads
- Add support for logical decoding of WAL data, to allow database changes to be streamed out in a customizable format
- Allow background worker processes to be dynamically registered, started and terminated