SQL Masterclass for Data Engineers

The SQL interview playbook built from 8 years of real data engineering experience.

This isn't a textbook or a certification dump. Every question comes from real interviews, real production scenarios, and real debugging sessions across MNCs, FAANG, startups, and service companies.

📘 What's Inside

- 15 Modules covering every SQL topic tested in Indian DE interviews

- 100 Scenario-Based MCQs — not "what is a JOIN" theory questions

- Detailed Rationale for every answer — why the correct answer works AND why each wrong answer fails

- "How to Answer" coaching — exact phrasing for how to deliver your answer under interview pressure

- Real production stories illustrating when each concept matters in actual pipelines

📋 Modules Include

Fundamentals & Data Types | Joins & Set Operations | Subqueries & CTEs | Window Functions | Aggregation & GROUP BY | Query Optimization | Indexing Strategies | Stored Procedures & Functions | Transactions & Locking | Performance Tuning | and more

🎯 Difficulty Levels

- Easy (Q1–30): Screening rounds at service companies and entry-level positions

- Medium (Q31–70): Technical rounds at product companies, analytics firms, and consultancies

- Hard (Q71–100): Senior/Staff-level design questions at top-tier companies

📊 Specs

- 55 pages | 15 modules | 100 MCQs

- PDF format — works on any device

- Written by a Senior Data Engineer with 8 years across 6 companies

💡 Who This Is For

- Data Engineers preparing for interviews (0–10 years)

- Anyone who lists SQL on their resume and gets asked about it

- Professionals targeting any Indian company that interviews on SQL

One PDF. 100 answers. The confidence to walk into any SQL interview prepared.