June 2026: Delivered comprehensive documentation for the new regr_r2(y, x) aggregate function in questdb/documentation, detailing its definition, behavior, math form, edge cases, and three worked examples. Aligned with the implementation PR questdb/questdb#7104 and added a May 2026 changelog entry. Validated docs locally (yarn start), ensured KaTeX rendering, and verified changelog anchors. This work improves developer onboarding and SQL analytics capabilities by clarifying how regr_r2 operates and where it diverges from corr^2.

May 2026 Monthly Summary: Delivered substantial SQL analytics enhancements and performance improvements in QuestDB, accompanied by expanded documentation. Key features include new window functions ntile, cume_dist, and nth_value (with LONG and TIMESTAMP support) and cross-column FILL(PREV) plus parallelized SAMPLE BY. Documentation updates cover new window functions and the SAMPLE BY FILL fast-path usage. Major bugs fixed: none reported this month. Impact: richer analytics capabilities, faster processing of large datasets, and clearer guidance for users; overall, strengthened platform readiness for analytics workloads. Technologies demonstrated include advanced SQL windowing, multi-type support, benchmarking, and user-focused documentation.

April 2026 monthly summary highlighting key business value and technical achievements across QuestDB repositories. Delivered new analytics capabilities, strengthened CI reliability, fixed critical window function edge cases, and expanded documentation to accelerate adoption and reduce support overhead.