PostgreSQL is an advanced, enterprise-class, and open-source relational database system that supports both SQL (relational) and JSON (non-relational) querying. It is a highly stable database backed by more than 20 years of development support from the open-source community. This thorough and collaborative approach has contributed to its high levels of resilience, integrity, and accuracy. PostgreSQL allows you to store, process, and retrieve data safely and it is widely used as the primary database for many web, mobile, and analytics applications.