DuckDB is an open-source, in-process SQL OLAP database management system designed for fast analytical queries on large datasets. It is optimized for use on a single machine, making it lightweight and efficient for embedded analytics, data exploration, and quick prototyping. DuckDB supports columnar data formats like Parquet and integrates seamlessly with data analysis tools such as Python and R, enabling users to work with data efficiently without the need for a separate database server. It is often referred to as the SQLite for analytics due to its simplicity and focus on analytical workloads.