A practical 2025 guide to SQL for BI analysts: SELECT patterns, joins, aggregations, window functions (ROW_NUMBER, RANK, LAG/LEAD), CTEs, and performance tuning with indexes, partitions, and EXPLAIN.

A 2025 UX guide to build high-converting dashboards using drill-through, bookmarks, and buttons. Includes patterns for Power BI, Tableau, and Looker, with navigation, context, and accessibility best practices.