PostgreSQL<p><strong>PostgreSQL</strong> is an open-source object-relational database system used for SQL-based application data, transactional workloads, extensible data types, indexing, stored logic, and enterprise web or application back ends.</p><p><strong>Additional Resources</strong>:</p><ul><li><a href="https://www.postgresql.org/" target="_blank" rel="noopener">PostgreSQL</a></li><li><a href="https://www.postgresql.org/docs/" target="_blank" rel="noopener">PostgreSQL documentation</a></li><li><a href="https://www.postgresql.org/about/featurematrix/" target="_blank" rel="noopener">PostgreSQL feature matrix</a></li></ul>