ryq99 / data_science_foundations

This repo contains everything about data science covering knowledges, concepts, skills, and drills.

Data Science Foundations

SQL

SQLZoo: SQLZoo offers interactive SQL tutorials with various levels of difficulty, ranging from basic to advanced. It provides hands-on exercises and quizzes to practice SQL queries across different databases.

HackerRank: HackerRank is a coding platform that offers SQL challenges to solve. It covers a wide range of topics and provides real-world scenarios to test your SQL skills.

LeetCode: LeetCode is primarily known for its coding challenges, but it also has a dedicated section for SQL problems. You can solve SQL puzzles, practice writing efficient queries, and learn from the solutions and discussions provided by the community.

Mode Analytics SQL School: Mode Analytics provides an interactive SQL tutorial that covers SQL fundamentals, intermediate topics, and advanced techniques. The tutorial includes exercises and examples to practice SQL queries.

Codecademy: Codecademy offers an interactive SQL course that allows you to learn and practice SQL in a hands-on manner. The course covers SQL syntax, querying databases, and manipulating data.

SQL Fiddle: SQL Fiddle is a web-based tool that allows you to write, execute, and share SQL code snippets. You can practice SQL queries using different database systems like MySQL, PostgreSQL, Oracle, and more.

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