PostgreSQL Exercises VS dbForge SQL Complete

• Free and accessible
  PostgreSQL Exercises is completely free to use with no registration required, making it highly accessible to anyone who wants to practice SQL skills without any financial barrier.
• Interactive practice environment
  The site provides a built-in SQL query editor where users can write and execute queries directly in the browser against a real database, getting immediate feedback on their results.
• Progressive difficulty
  Exercises are well-organized into categories (basic, joins, aggregation, date, string, recursive) and progress from simple to complex, allowing learners to build their skills incrementally.
• Realistic dataset
  The site uses a realistic country club management scenario with interconnected tables, giving learners practice with a coherent and relatable data model rather than abstract or disconnected examples.
• Detailed solutions and explanations
  Each exercise comes with a detailed expected result set and a thorough explanation of the solution, helping learners understand not just what the answer is but why it works.

Possible disadvantages

• Limited dataset scope
  The entire site relies on a single small dataset (a country club with members, facilities, and bookings), which limits exposure to diverse data modeling patterns and real-world complexity.
• No user progress tracking
  Since there is no account system or registration, the site does not track user progress, making it difficult for learners to pick up where they left off or monitor their improvement over time.
• PostgreSQL-specific syntax
  The exercises focus specifically on PostgreSQL syntax and features, which may not directly translate to other database systems like MySQL, SQL Server, or Oracle, potentially limiting transferability of learned skills.
• Outdated design and interface
  The website has a dated visual design and user interface that lacks modern UX features such as syntax highlighting, auto-completion, or responsive mobile support, making it less pleasant to use compared to newer platforms.
• Limited number of exercises
  The total number of exercises is relatively small compared to other competitive programming or SQL practice platforms, meaning advanced users may quickly exhaust the available problems.

• IntelliSense
  Provides advanced code completion features that help increase productivity by suggesting keywords, table names, and other SQL elements as you type.
• Code Formatting
  Allows for customizable SQL code formatting to maintain consistent code style and readability across teams.
• Code Snippets
  Offers a library of snippets for commonly used SQL statements, enabling users to quickly insert complex statements without typing them out.
• SQL Refactoring
  Facilitates easy refactoring of SQL code, which helps in maintaining and improving existing codebases without altering its functionality.
• Execution Plan
  Visualizes the execution plan of a query, aiding in performance optimization by identifying bottlenecks and inefficient operations.
• Data Generation
  Includes capabilities for generating realistic test data, which is useful for development and testing purposes.

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SQL Debugger in the new version of dbForge SQL Complete

• Learn SQL by Typing It: Three Browser Database Terminals Compared

  Disclosure: I help build these simulators; they are part of 50+ free DevOps games and simulators. For more practice beyond them, SQLBolt and PostgreSQL Exercises are excellent and free, and SQL Murder Mystery is the most fun anyone has... - Source: dev.to / 2 months ago

Tracking dbForge SQL Complete since Mar 2021.