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sql-challenges

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SQL Case Files is a free interactive SQL game that teaches SQL through crime-solving challenges. Learn SQL online with hands-on puzzles, realistic datasets, SQL practice exercises, and a full browser-based SQLite database. Perfect for beginners learning SQL, data analysts preparing for interviews, and anyone who wants to practice SQL for free.

  • Updated Nov 20, 2025
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hackerrank-sql-challenges-solutions

HackerRank SQL Challenges Solutions is a comprehensive educational code repository designed to store, organize, and demonstrate solutions for relational database queries. Developers and computer science students utilize this platform to practice complex joins, aggregate functions, and advanced data filtering techniques effectively.

  • Updated Nov 15, 2026
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