Practical guides and best practices for mastering SQL, from basic queries to advanced database analytics for product analysts. Level up your SQL skills with real-world examples and proven techniques.
Master window functions like ROW_NUMBER(), RANK(), and LAG() to perform advanced analytics. Learn practical examples for user retention, running totals, and cohort analysis.
Understand the differences between JOIN types and learn when to use each one. Includes real-world examples from user behavior analysis and product metrics.
Learn how to write efficient SQL queries that perform well on millions of rows. Covers indexing, query planning, and common performance pitfalls.
When should you use CTEs versus subqueries? Compare readability, performance, and use cases with practical examples from product analytics.
Essential date manipulation techniques for time-series analysis, cohort studies, and seasonal trend analysis in SQL.