Want to become an SQL expert and ace database interviews at top tech companies? LeetCode’s dedicated database problem set is the ultimate resource to sharpen your SQL fundamentals, tackle real-world query scenarios, and boost your problem-solving skills — all in one place.
Whether you’re just starting out with SELECT queries or want to master advanced joins, aggregations, nested subqueries, window functions, and optimizations, LeetCode offers problems modeled after actual interview challenges. You’ll practice, learn, and build hands-on experience recruiters notice.
Start practicing here: LeetCode Database Problem Set
Why Practice SQL on LeetCode?
- Comprehensive Coverage: Practice everything from basic SELECT/WHERE to complex multi-table joins and aggregations.
- Real Interview Relevance: Build confidence for company interviews with problems modeled after actual technical questions.
- Instant Feedback: Online judge gives immediate correctness checks, so you learn by doing.
- Community and Editorials: Read discussion threads and official solutions when you get stuck.
- Progress Tracking: Leverage structured study plans (like Top 50 SQL Questions) for daily, incremental skill improvement.
Pro Tips for Success
- Solve 1–2 problems every day and revisit problems where you struggled.
- Practice common interview questions, from Second Highest Salary to Friends Recommendation, for deeper understanding.
- Share your LeetCode profile on LinkedIn to showcase practical skills to recruiters.
- Review optimized solutions, experiment with CTEs, window functions, and advanced SQL topics for top performance.
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