Building on our exploration of the query life cycle in Vertica, this session, shifts focus towards actionable best practices and common pitfalls in query tuning. It demystifies the complexities of query optimization in Vertica, presenting a clear roadmap of do's and don'ts to ensure queries run with optimal efficiency. Participants will delve into essential techniques for enhancing query speed and accuracy, from leveraging Vertica's analytics and storage capabilities to tuning data distribution and projection strategies. The session will also highlight critical mistakes to avoid, such as misusing or overlooking key features that can lead to suboptimal performance.