Crack the SQL Interview

Stop failing technical rounds because of tricky SQL queries.

While everyone else is solely focused on grinding standard algorithms, companies are heavily filtering candidates using complex database and SQL rounds. This 105-page playbook is your ultimate cheat sheet to crush them.

I have compiled over 100 of the most frequently asked SQL interview questions (straight from LeetCode) along with clean, optimized solutions so you don't have to spend hours debugging on your own.

What’s inside the guide? You get exact problem descriptions, table schemas, expected outputs, and the raw SQL queries to solve them. We cover the heavy-hitting concepts that interviewers love to test:

1. Complex Joins & Subqueries: Master INNER, LEFT, and multiple table joins without getting lost in the data.
2. Aggregations & Grouping: Nailing GROUP BY, HAVING, and aggregate functions for sales and product analysis case studies.
3. Window Functions & Ranking: The secret weapons for scoring high. Learn how to accurately rank scores and handle consecutive numbers.
4. Real-World Scenarios: User activity tracking, financial transaction analysis, e-commerce order filtering, and social media reporting.

Who is this for? Software Engineers, Backend Developers, and Data Analysts who want a massive repository of solved SQL problems to cram and practice with before walking into top-tier tech interviews.

Stop guessing the syntax. Grab the playbook and start writing production-level queries today.