Скачать или смотреть How to Master SQL | SQL ZOO | HackerRank | LeetCode

SQLZoo, HackerRank, and LeetCode are three popular platforms designed to help individuals improve their coding and problem-solving skills, each catering to different learning needs.

*SQLZoo* focuses on teaching SQL through interactive tutorials. It provides a range of exercises, from basic to advanced SQL concepts, allowing learners to practice queries directly in a live environment. It's ideal for beginners looking to develop their SQL skills with hands-on learning.

*HackerRank* offers a broader range of coding challenges across domains like algorithms, data structures, artificial intelligence, and databases. It supports over 30 programming languages and is widely used for interview preparation. The platform also features company-specific coding challenges, competitive programming contests, and detailed performance tracking, making it suitable for both beginners and advanced users looking to improve coding skills and prepare for technical job interviews.

*LeetCode* specializes in algorithmic problem-solving, with a strong emphasis on preparing for technical interviews at major tech companies. It features thousands of problems categorized by difficulty (easy, medium, hard) and focuses on data structures and algorithms. The platform includes a built-in online judge for testing solutions and a community-driven forum for discussing strategies, making it highly valuable for job seekers and those looking to sharpen their coding abilities.

In summary, SQLZoo is great for SQL learners, while HackerRank and LeetCode serve those preparing for coding interviews or wanting to improve problem-solving skills.