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SQLZOO VS Opal.so

Compare SQLZOO VS Opal.so and see what are their differences

SQLZOO

SQLZoo includes tutorials and reference to support people learning SQL. It features:

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0 reviews
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Opal.so

Real Focus in Real-Time. Measure and improve your focus day by day, on iPhone, iPad and macOS.

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Sugarbug
Connect your tools into a living knowledge graph. Sugarbug captures every signal to deliver compounding insights and unified context. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, SQLZOO seems to be more popular. It has been mentioned 20 times since March 2021.

social mentions
20 vs 0
Online Learning popularity
100% vs 0%
alternatives listed
84 vs 210

Base details

Website, pricing, platforms and company facts side by side.

SQLZOO
Opal.so
Website sqlzoo.net opal.so
Pricing —
Official pricing
Listed in
Online Learning Online Education Online Courses Programming +1
Focus Productivity Time Tracking Time Management +1

Features and specs

What each product offers, as listed by its team.

SQLZOO 4 features
Opal.so 0 features
  • 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  • Outdated interface
    The website's interface can appear outdated, which might detract from the user experience and make navigation less intuitive.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.

No features have been listed yet.

Videos

Walkthroughs and reviews on video.

SQLZOO 2 videos + Add
Opal.so 0 videos + Add

SQLZOO Select from Nobel

More videos

  • - SQLZOO Select Names

No Opal.so videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
SQLZOO
Opal.so
100% 100%
Online Learning
0% 0%
0% 0%
Productivity
100% 100%
100% 100%
Online Courses
0% 0%
0% 0%
Focus
100% 100%

User comments

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

SQLZOO no reviews yet
Opal.so no reviews yet

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

SQLZOO 20 mentions
Opal.so 0 mentions
  • Practicing SQL
    Https://sqlzoo.net/ is one of my faves. Source: about 5 years ago
  • I’d like 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

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Tracking Opal.so since May 2025.

Alternatives to SQLZOO and Opal.so

When comparing SQLZOO and Opal.so, you can also consider the following products.

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