postgresql: postgresql (PostgreSQL Database System) postgresql: postgresql: PostgreSQL is a powerful, open source relational database system, which postgresql: has a proven architecture that has earned it a strong reputation for postgresql: reliability, data integrity, and correctness. It is fully ACID compliant, postgresql: has full support for foreign keys, joins, views, triggers, and stored postgresql: procedures (in multiple languages). It includes most SQL92 and SQL99 postgresql: data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, postgresql: INTERVAL, and TIMESTAMP. It also supports storage of binary large postgresql: objects, including pictures, sounds, or video. postgresql: