Overview
Writing efficient SQL queries, Using SELECT, WHERE, GROUP BY, HAVING, ORDER BY, LIMIT, Handling NULLs, CASE WHEN, and data filtering, Performing INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN operations, Subqueries and nested SELECT statements
SQL beginners and intermediates, Students preparing for HackerRank, LeetCode, and job interviews, Anyone who wants real SQL practice beyond just syntax
Basic understanding of SQL is helpful
Welcome to the SQL Coding Challenge Bootcamp: 50 Challenges Solved – your one-stop solution to mastering SQL through real-world coding problems!
Whether you're a beginner, a data science enthusiast, or preparing for technical interviews, this course will guide you through the 50 most essential SQL challenges, commonly asked in HackerRank, LeetCode, and top tech company interviews.
Master SQL by Solving 50 Real-World Challenges – Build Query Skills for Data Science, Interviews, and HackerRank Success
In this hands-on bootcamp, each SQL challenge is solved step-by-step with clear explanations, optimized solutions, and real datasets. You’ll go from writing basic queries to solving complex problems involving joins, aggregations, subqueries, window functions, and more.
Why This Course Stands Out:
Real-world problems from HackerRank/LeetCode
Fully solved challenges with walkthroughs
Builds confidence for coding rounds & interviews
Best practice for SQL in Data Science & Analytics
Suitable for job preparation and career switchers
We’ve made sure to start from the fundamentals and gradually move into intermediate and advanced problems, making this bootcamp perfect for both beginners and upskillers.
By the End of This Course:
You will have solved 50 practical challenges.
You will understand how to approach real-world data queries.
You’ll gain confidence to take on SQL interviews.
You’ll be equipped with a portfolio-ready SQL skillset.
ARUNNACHALAM SHANMUGARAAJAN
Hi, I'm Arunnachalam R S from India — a Computer Science graduate with a strong passion for Cybersecurity and emerging technologies. I’ve chosen cybersecurity as my professional domain and am deeply committed to staying ahead in this ever-evolving field.
As a tech educator, I enjoy sharing my knowledge about the latest technological advancements, security practices, and innovations in science and IT. My mission is to simplify complex concepts and help learners of all levels gain practical skills they can apply in real-world scenarios.
I’m excited to be part of the Udemy platform, where I can express my passion for technology, contribute to the global learning community, and empower others through quality education.