PostgreSQL is a powerful, open-source relational database management system (RDBMS) known for its reliability, extensibility, and robust SQL compliance. In a streaming ETL (Extract, Transform, Load) workflow, PostgreSQL often serves as a destination for transformed data, enabling real-time storage, querying, and analytics. Its support for complex queries and diverse data types makes it a versatile choice for data-driven applications.

• Real-Time Data Storage: Load transformed data into PostgreSQL for structured and consistent storage, supporting high availability and scalability.
• Transactional and Analytical Queries: Use PostgreSQL to store transactional data and execute analytical queries for reporting and insights.
• Integration with Applications: Support backend systems by feeding ETL-transformed data into PostgreSQL for real-time use in applications.
• Complex Data Modeling: Store multi-relational or hierarchical data structures processed by ETL pipelines for advanced querying and reporting.