About PostgreSQL
PostgreSQL is a powerful, open source object-relational database system with over 35 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.
Extended data types
Primitives, Structured, document, geometry and user defined types.
Performance
Postgres delivers robust performance suited to enterprise applications.
Data integrity
Postgresql includes many advanced constraints kit for data integrity, in addition to primary and foreign keys.
Spatial database
Using database extenders like PostGIS you can build geographic information systems (GIS) on PostgreSQL.