What is a PostgreSQL database?

A PostgreSQL Database is an advanced, open-source relational database management system (RDBMS) known for its reliability, feature robustness, and performance. It supports both SQL (relational) and JSON (non-relational) querying, making it highly flexible for developers. PostgreSQL is widely used in various industries for applications ranging from small web projects to large enterprise systems. Its strong compliance with standards, extensibility, and active community contribute to its popularity.