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Which is more popular?
Based on our record, SQLZOO
seems to be a lot more popular than PostgreSQL Exercises.
While we know about 20 links to SQLZOO,
we've tracked only 1 mention of PostgreSQL Exercises.
social mentions
20 vs 1
Online Learning popularity
85% vs 15%
alternatives listed
86 vs 9
Base details
Website, pricing, platforms and company facts side by side.
Comprehensive tutorials SQLZOO offers a wide range of tutorials covering various SQL topics, from basic to advanced levels, helping users to build a solid understanding of SQL.
Interactive learning The platform allows users to execute SQL queries directly within the tutorial, providing immediate feedback and a hands-on learning experience.
Diverse database support SQLZOO covers multiple SQL dialects and database systems, such as MySQL, PostgreSQL, and SQL Server, making it versatile for different learners.
Free resource SQLZOO is a free-to-use platform, accessible to anyone with an internet connection, making it an excellent resource for self-learners.
Possible disadvantages
Outdated interface The website's interface can appear outdated, which might detract from the user experience and make navigation less intuitive.
Limited depth While SQLZOO covers a broad range of topics, it may not delve deeply into each subject, potentially requiring users to seek additional resources for advanced concepts.
Mixed user feedback Some users have reported that certain exercises or explanations can be confusing or unclear, which might be challenging for beginners.
No formal certification SQLZOO does not offer any certification upon completion, which might be a drawback for users looking to validate their skills formally.
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.
Analysis
An editorial look at what each product does well and who it suits.
SQLZOOPostgreSQL Exercises
No analysis of SQLZOO yet.
Overall verdict
PostgreSQL Exercises (pgexercises.com) is an excellent free resource for learning and practicing SQL through hands-on, interactive problems with immediate feedback, making it a valuable tool for anyone looking to sharpen their PostgreSQL skills.
Why this product is good
It offers a structured progression of exercises, from basic queries to advanced topics like aggregation, joins, string operations, recursive queries, and date manipulation
Each exercise runs against a realistic sample database (a fictional country club), giving practical context to the problems
It provides instant feedback and detailed explanations of solutions, reinforcing learning
The platform is completely free and requires no signup, so you can start practicing immediately
It focuses specifically on PostgreSQL, so you learn Postgres-specific syntax and features rather than generic SQL
Recommended for
Beginners who want to learn SQL fundamentals in a hands-on way
Developers and analysts who want to strengthen their PostgreSQL query skills
People preparing for technical interviews that involve SQL
Students supplementing coursework with practical exercises
Anyone transitioning to PostgreSQL from another database system
Structured Query Language (SQL) is just a language purely designed to store and retrieve data from a database, so imagine the boredom you will experience when programming a warehouse. Yet SQLZOO wants you to learn SQL...
Sql Zoo https://sqlzoo.net is great. Starts with really basic queries and gradually moves to more advanced queries and joins. There are tests for each section to help internalize it.
Source:
about 5 years ago
Student unsure of taking on an internship
Check out sites like https://sqlzoo.net and try out the basics of SQL. And if that grabs your attention head over to youtube or udemy and take some courses.
Source:
about 5 years ago
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
Alternatives to SQLZOO and PostgreSQL Exercises
When comparing SQLZOO and PostgreSQL Exercises, you can also consider the following products.
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