SQL Interview Kit (2025): 100+ Challenges & Solutions

Learn SQL through 100+ challenges designed for interviews, practice, and career growth
What you'll learn
Solve 100+ real-world SQL interview problems across all difficulty levels.
Analyze, break down, and structure complex SQL queries confidently.
Master SQL techniques like joins, window functions, CTEs, and pivots.
Learn professional thinking strategies for real-life database scenarios.
Requirements
Basic understanding of SQL syntax is helpful but not mandatory.
Access to any SQL environment (MySQL, SQL Server, PostgreSQL, etc.).
Curiosity to solve real-world problems and willingness to learn by practicing.
Description
Can you write SQL queries, but freeze when the interviewer throws a real scenario at you?You're not alone. Many people know the syntax — but struggle to solve problems that look messy, business-driven, and open-ended.That's exactly why I built this course: your SQL Interview Kit (2025).Inside, you'll practice 100+ real challenges, inspired by actual company interviews and day-to-day tasks faced by analysts and engineers.What Makes This Course DifferentThis isn't a theory dump. It's hands-on problem solving.Every challenge puts you in the shoes of an analyst solving for a product, a business team, or a client.Here's what you'll tackle:E-commerce & product funnels → find drop-offs, repeat buyers, cart abandoners.Banking & finance → detect risky trades, track customer tenure, calculate percentiles.Healthcare & fitness → retention metrics, patient gaps, appointment delays.Media & OTT apps → session streaks, genre trends, cross-platform users.Operations & logistics → shipping delays, courier performance, returns.Along the way, you'll also learn to spot patterns:When to use joins vs anti-joinsHow to choose between window functions vs GROUP BYHow to debug issues with NULLs, duplicates, and overlapsHow to explain your query clearly under interview pressureHow You'll LearnEvery problem comes with a structured hint and a clean solution.Many challenges also include video walkthroughs — where I guide you through the thought process step by step.Sections are organized like an interview itself: starting simple, building up to complex case studies.Who This Course Is ForWhether you're:Preparing for your first SQL interview,Switching careers into data, orAlready working and want to sharpen your problem-solving muscle —This course is designed to make you truly job-ready in SQL.No filler. No copy-paste answers. Just structured practice with real scenarios — so you walk into any interview with clarity and confidence.
Who this course is for
Final-year students, fresh graduates, or early-career professionals preparing for SQL interviews.
Self-taught developers or career-switchers who want hands-on SQL practice.
Analysts, testers, and backend engineers looking to strengthen SQL problem-solving skills.
Anyone who wants real-world SQL challenges to boost confidence and job-readiness.
Homepage

https://www.udemy.com/course/sql-interview-kit-2025-100-challenges-solutions/

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