30-Question HARD-LEVEL SQL Interview Practice Set with ADITYA KALYAN

Struggling with SQL interview rounds at KPMG, EY, Deloitte, PwC, or product/analytics companies?

This is a hard-level, interview-ready practice set built specifically to prepare you for the window-function and business-logic questions that trip up most candidates.

What you get:

1. 3 ready-to-use tables (customers, products, orders) with realistic sample data — copy-paste and run instantly
2. 30 hard-level SQL questions covering real interview patterns
3. Full MySQL solutions with expected outputs for every single question
4. A "Priority Practice" roadmap so you know exactly what to focus on first
5. 9 bonus SQL optimization/theory questions (EXISTS vs IN, indexing, execution order, and more)

Topics covered:

1. Window functions — ROW_NUMBER, RANK, DENSE_RANK, LAG/LEAD, NTILE
2. Running totals & running revenue
3. CTEs and correlated subqueries
4. Customer churn analysis
5. RFM analysis (Recency, Frequency, Monetary)
6. Month-over-month growth calculations
7. Top-N per group problems
8. Deduplication logic
9. End-to-end business case queries (the exact style Big 4 firms ask)

Who this is for :

1. Data Analysts and Business Analysts preparing for interviews
2. SQL learners who've mastered basics and want to level up to advanced/window functions
3. Anyone targeting analytics roles at consulting or Big 4 firms.

Format : PDF — instant download after purchase.