SQL Challenge – New Year Challenge 2026

Recursive CTE Practice Sheet – From Fundamentals to Interview-Grade Problems

SQL Subquery Practice Sheet – 30+ Progressive Problems from Basics to MAANG-Level

Window Functions Practice Sheet – 150+ Real-World Problems Across 12 Business Domains

SQL Window Functions – Complete Step-by-Step Ebook

Common Table Expressions (CTEs) & Recursive CTEs – Complete Step-by-Step Ebook

Mastering SQL Subqueries – A Friendly Step-by-Step Ebook (Free)

Ultimate SQL Interview & Practice Bundle + VIP SQL Inner Circle (Lifetime Access)