PostgreSQL Exercises VS SQL Prompt

• 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• Outdated design and interface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.

• Code Completion
  SQL Prompt provides intelligent code completion that suggests relevant keywords and object names, speeding up the coding process and reducing errors.
• Code Formatting
  It offers customizable code formatting options, allowing users to maintain consistent code style across their SQL scripts and collaboration with team members.
• Code Analysis
  SQL Prompt includes static code analysis that highlights potential issues, helping developers identify and fix performance and security problems quickly.
• Snippet Manager
  The tool allows users to create and manage code snippets, saving time when writing repetitive code patterns or frequently used queries.
• Auto-expands Wildcards
  Automatically expands wildcard characters to full column lists, helping avoid potential issues related to schema changes and improving query maintenance.
• Integration
  Seamless integration with popular SQL Server development environments like SQL Server Management Studio (SSMS) and Visual Studio boosts productivity.

Possible disadvantages

• Cost
  SQL Prompt is a paid tool, which may not be suitable for individual developers or small teams with limited budgets.
• Learning Curve
  New users may experience a learning curve to fully utilize all features and customization options available in SQL Prompt.
• Limited to SQL Server
  SQL Prompt is designed specifically for SQL Server, which limits its use for developers who work with other database management systems.
• Performance Overhead
  The tool might add some performance overhead to the development environment, especially on older machines, potentially affecting IDE responsiveness.
• Dependency on Specific IDEs
  SQL Prompt is dependent on certain IDEs (like SSMS and Visual Studio) to function, thereby limiting its integration with other development tools.

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  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 SQL Prompt since Mar 2021.