PostgreSQL, often nicknamed "Postgres," is an open-source relational database management system (RDBMS) known for its robustness, reliability, and extensibility. It is designed to store and manage structured data while offering powerful features for handling complex queries, transactions, and scalability.
PostgreSQL supports SQL (Structured Query Language) and provides advanced features like ACID (Atomicity, Consistency, Isolation, Durability) compliance, support for various data types (including JSON and XML), full-text search capabilities, and extensibility through the use of extensions and custom functions. It's widely used across different industries for various applications ranging from small-scale projects to large enterprise systems due to its stability, features, and community support.