Worked on the nodejs/node repository to enable the SQLite Percentile extension, allowing percentile calculations to be performed directly within SQL queries. This feature enhanced in-database analytics for Node.js applications by reducing the need for external data processing. The implementation involved integrating the extension with the existing SQLite API and developing automated JavaScript tests to verify the correctness of percentile computations and seamless API integration. Using skills in SQL, JavaScript testing, and database management, the work focused on improving analytics capabilities for applications relying on SQLite. The contribution was reviewed by core maintainers and linked to relevant issues and pull requests.