The 12 best platforms to practice SQL

SQL, the structured query language, is a critical skill for anyone who works with data. To master this powerful language, constant practice is crucial. We present a curated list of 12 top-notch platforms that offer a variety of SQL exercises and challenges to help you hone your SQL skills. Whether you're a beginner or a seasoned data professional, these platforms will help you improve your SQL experience.

1. Hacker Rank: HackerRank, a popular platform for coding challenges, offers a wide collection of SQL problems, from beginner to advanced. You can practice SQL queries, joins, aggregations, and more. HackerRank offers a gamified learning experience with points and leaderboards, making learning fun and engaging.

Key Features:

• Extensive library of SQL challenges
• Real world problem scenarios
• Customizable difficulty levels
• Timed challenges to simulate interview conditions.
• Detailed solutions and explanations.

Best app: Practicing SQL for interviews and technical assessments.

1. LeetCode: While primarily known for coding challenges in other languages, LeetCode also offers its fair share of SQL problems. You can practice SQL queries and optimize your solutions to improve their performance.

Key Features:

• Wide range of SQL problems
• Company Specific SQL Questions
• Discussion forums for collaborative learning
• Simulated interview environment
• Detailed solutions and explanations.

Best app: Preparation for SQL interviews at top technology companies.

1. StrataScratch: StrataScratch specializes in real-world data challenges, including SQL problems from top technology companies. By solving these problems, you will be able to gain hands-on experience and learn how SQL is applied in real-world scenarios.

Key Features:

• Real-world data challenges from top tech companies
• SQL problems with different levels of difficulty.
• Community-driven platform with peer reviews
• Detailed solutions and explanations.

Best app: Gain hands-on experience in SQL and prepare for data analyst and data engineer roles.

1. SQLZoo: SQLZoo offers interactive tutorials and exercises to help you learn SQL step by step. It is a great platform for beginners to understand fundamental SQL concepts such as SELECT, JOIN, and aggregate functions.

Key Features:

• Tutorials and interactive exercises.
• Step by step guide
• Immediate comments and explanations.
• Focus on fundamental SQL concepts

Best app: Beginners to learn SQL concepts and practice basic SQL queries.

1. FactsLemur: DataLemur provides a curated collection of SQL interview questions from top technology companies. It is a valuable resource for preparing for SQL interviews and mastering advanced SQL concepts such as window functions and conditional aggregation.

Key Features:

• Selected Collection of SQL Interview Questions
• Detailed explanations and solutions.
• Focus on advanced SQL concepts such as window functions and conditional aggregation.

Best app: Preparation for advanced SQL interviews and data engineering roles.

1. Mode: Mode is a data analysis platform that offers SQL tutorials and exercises. You can learn SQL while working on real-world data analysis projects. Mode's easy-to-use interface and integration with other data tools make it a great platform for both beginners and experienced data analysts.

Key Features:

• SQL Interactive Tutorials and Exercises
• Real-world data analysis projects.
• Collaboration features for team projects
• Integration with other data tools.

Best app: Learn SQL in a practical context and develop data analysis skills.

1. SQLPad: SQLPad is a web-based SQL editor that allows you to write and execute SQL queries directly in your browser. It is a convenient tool for testing your SQL code and experimenting with different database systems. SQLPad is ideal for quick practice and experimentation.

Key Features:

• Web-based SQL editor
• Support for multiple database systems.
• Quick and easy testing of SQL queries
• No configuration required

Best app: Experiment with SQL queries and try code snippets.

1. exercise: The exercise offers a structured learning approach for SQL. You can practice SQL problems and receive feedback from experienced mentors. Exercism's mentoring program provides personalized guidance and helps you improve your SQL skills.

Key Features:

• Tutoring and code reviews
• Focus on learning through practice
• Wide range of languages ​​and programming tracks.
• Community Driven Learning Environment

Best app: Improve SQL skills through a structured learning approach and peer feedback.

1. Code wars: Codewars is a gamified coding platform where you can practice SQL through challenges called “kata.” It's a fun and engaging way to improve your SQL skills. Codewars also offers a strong community of programmers, allowing you to learn from others and collaborate on solutions.

Key Features:

• Gamified learning experience
• Competitive coding challenges
• Honor system to maintain code quality.
• Diverse range of programming challenges

Best app: Practicing SQL in a fun and competitive environment.

1. SQLBolt: SQLBolt provides simple and effective SQL tutorials and exercises. It is a good starting point for beginners to learn the basics of SQL. SQLBolt's clear explanations and interactive exercises make learning SQL easy and fun.

Key Features:

• Simple and easy to use interface
• Clear explanations and examples.
• Interactive exercises to reinforce learning.
• Focus on SQL basics

Best app: Beginners to learn the fundamentals of SQL.

1. SQL Practice: SQL Practice offers a large collection of SQL practice problems, covering a wide range of topics. It's a great resource to practice SQL and improve your problem-solving skills. SQL Practice provides detailed solutions and explanations for each problem, helping you understand the underlying concepts.

Key Features:

• Large collection of SQL practice problems.
• Detailed solutions and explanations.
• Focus on practical SQL skills
• Customizable practice sessions

Best app: Practicing SQL for data analyst and data engineer roles.

1. SQL Mock Interview: SQL Mock Interview provides mock SQL interviews with real interviewers. It's a valuable tool for practicing your SQL skills under pressure and receiving feedback from experienced professionals. SQL Mock Interview can help you improve your communication skills and build confidence for real-world interviews.

Key Features:

• Mock SQL Interviews with Real Interviewers
• Personalized feedback and coaching
• Opportunity to practice under pressure.
• Focus on interview techniques and communication skills.

Best for: Preparation for SQL interviews and improving communication skills.

By consistently practicing SQL on these platforms, you can strengthen your foundation, improve your problem-solving skills, and prepare for SQL-related interviews and job roles. Remember, the more you practice, the more proficient you will be in SQL. So, start your SQL learning journey today and unleash the power of data!