Best SQL Practice Platforms and Websites (Updated for 2025)
In this article, we’ve gathered the best platforms to learn and practice SQL in 2025. We hope you find the most appropriate tool for your needs.
Published March 17, 2026
Blog
Union vs Union All in SQL: Key Differences and When to Use Each
This article dives into the key distinctions, use cases, and best practices for UNION and UNION ALL in SQL.
Published March 17, 2026
How to Use DENSE_RANK in SQL: Examples and Use Cases
This article explains how to use the DENSE_RANK function in SQL, providing syntax, practical examples, and use cases for ranking data without gaps. Whether you're creating leaderboards, analyzing sales, or ranking performance, this guide covers it all.
Published March 17, 2026
The Amazon STAR Method: How to Nail Behavioral Interview Questions
Amazon expects you to prepare for their interview questions using the STAR method, ensuring your responses align with their standards. But what exactly is the STAR method? Let’s explore.
Published March 17, 2026
SQL Aggregate Functions Explained: Examples and Best Practices
In this article, we’ll explore SQL aggregate functions and their syntax, provide real-world examples, and share best practices for using them effectively.
Published March 17, 2026
What Is SQL Subquery? Types, Examples, and Optimization Tips
SQL subqueries are powerful tools that allow you to nest queries within other queries, enabling complex data retrieval and manipulation. They act as temporary result sets that can be used within a larger query to perform operations that would be difficult
Published March 17, 2026
SQL Order of Operations: Full Guide in 2025
Understanding the SQL order of operations is like mastering the art of culinary timing. It ensures that each step of your query is processed in the right order, resulting in a perfectly prepared result set that's both efficient and accurate.
Published March 17, 2026
How to Use SQL LAG Function
This article explores the SQL LAG function, a powerful tool for accessing previous row data in queries. It covers syntax, practical examples, and advanced use cases for analyzing trends, detecting anomalies, and performing time-based calculations.
Published March 17, 2026
How to Use SQL Except
This article dives into the SQL EXCEPT operator, showing how it helps filter out data from one set that appears in another. With examples combining EXCEPT with operators like IN, LIKE, and BETWEEN, you'll see how to create precise queries for tasks like i
Published March 17, 2026
Division in SQL
SQL division is a powerful yet often overlooked operation that can solve complex data retrieval problems. Let's dive deeper into this concept and explore its real-world applications.
Published March 17, 2026
Top Data Science Models Explained
This article delves into the most widely used data science models, explaining their principles, strengths, and limitations. It covers models like linear regression, decision trees, neural networks, and clustering, showcasing their applications across indu
Published March 17, 2026
Top SQL Games for Fun Learning in 2025
In this article, we'll explore the top SQL games you can play while learning, each offering a unique twist on database querying. Whether you're looking to solve crimes, escape deserted islands, or manage intergalactic empires, these games provide an engag
Published March 17, 2026