SQL for BI Analysts (2025): Queries, Window Functions & Performance Tuning

SQL for BI Analysts: Queries, Window Functions, and Performance Tuning

Ashish Shetty

Seasoned Business Intelligence and learning and development professional with over 11 years of experience empowering students and professionals to unlock career success through data-driven skills. Specializing in Power BI, Tableau, and Prompt Engineering, Ashish is known for delivering practical, high-impact workshops and training programs across academic and corporate sectors.

November 6, 2025•14 min read

Level up your BI SQL. Learn high-impact query patterns, master window functions, and tune performance with indexes, partitions, and caching—plus ready-to-use snippets for dashboards and ad-hoc analysis.

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.

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SQL for BI Analysts: Queries, Window Functions, and Performance Tuning

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SQL for BI Analysts: Queries, Window Functions, and Performance Tuning

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