Software Alternatives & Startups

Select Star SQL VS CDN77

Compare Select Star SQL VS CDN77 and see what are their differences

Select Star SQL

Education & Reference

Rating
0 reviews
CDN77

Content Delivery Network - website speed acceleration with CDN77. 28+ PoPs, Pay-as-you-go prices, no commitments.

Rating
0 reviews
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Which is more popular?

Online Education popularity
100% vs 0%
alternatives listed
12 vs 174

Base details

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

SSS
Select Star SQL
CDN77
Website selectstarsql.com cdn77.com
Pricing —
Listed in

Features and specs

What each product offers, as listed by its team.

SSS
Select Star SQL 5 features
CDN77 7 features
  • Completely Free
    Select Star SQL is entirely free to use with no paywalls, subscriptions, or hidden costs. This makes it accessible to anyone who wants to learn SQL regardless of their financial situation.
  • Interactive Hands-On Learning
    The platform provides an interactive SQL environment directly in the browser where learners can write and execute real SQL queries against actual datasets, reinforcing concepts through practice rather than passive reading.
  • Real-World Dataset
    The course uses a compelling real-world dataset about Texas death row executions, which makes the learning experience more engaging and meaningful compared to abstract or contrived examples.
  • Well-Structured Progressive Curriculum
    The course is organized in a logical progression from basic SELECT statements to more advanced concepts like aggregations, joins, and subqueries, allowing learners to build knowledge incrementally without feeling overwhelmed.
  • No Setup Required
    There is no need to install any software, set up a database, or configure an environment. Learners can start writing SQL queries immediately in their web browser, removing a significant barrier to entry for beginners.

Possible disadvantages

  • Limited Scope
    The course covers only fundamental SQL concepts and does not address more advanced topics like window functions, CTEs, indexing, database design, or performance optimization, which are essential for professional SQL usage.
  • Single Database Dialect
    The platform teaches SQL using SQLite, and does not cover syntax differences or features specific to other popular database systems like PostgreSQL, MySQL, SQL Server, or Oracle, which learners may encounter in real jobs.
  • No Certificate or Credential
    Completing the course does not provide any formal certificate, badge, or credential that learners could use to demonstrate their SQL skills to potential employers or on professional profiles.
  • Limited Practice Exercises
    While the course includes some exercises, the total number of practice problems is relatively small compared to dedicated SQL practice platforms, which may not be sufficient for learners who need extensive repetition to solidify their skills.
  • Single Dataset Can Feel Restrictive
    Using only one dataset throughout the entire course means learners do not get experience working with diverse data schemas, table relationships, or different types of data, which limits exposure to varied real-world scenarios.
  • Global Network Coverage
    CDN77 offers an extensive global network with over 35 points of presence (PoPs) strategically located around the world, ensuring low latency and high-speed content delivery regardless of user location.
  • Real-Time Analytics
    Provides detailed real-time analytics that help you monitor traffic, performance, and error rates, allowing for quick adjustments and optimizations.
  • DDoS Protection
    Includes DDoS protection mechanisms to safeguard your data and website from malicious attacks, ensuring higher uptime and reliability.
  • Flexible Pricing Plans
    Offers flexible pricing options, including pay-as-you-go and custom plans, which can be tailored to fit various budgetary requirements and usage levels.
  • Support for Various Protocols
    Supports a wide range of protocols such as HTTPS, HTTP/2, and IPv6, which can help improve performance and security.
  • Video Streaming Optimization
    Specifically optimized for video streaming, featuring HTTP Live Streaming (HLS) support and real-time content transcoding options.
  • 24/7 Customer Support
    Provides round-the-clock support through multiple channels including chat, email, and phone, ensuring any issues are promptly addressed.

Possible disadvantages

  • Complex Setup for Beginners
    The initial setup and configuration can be somewhat complex for users who are not well-versed in networking or CDN technology.
  • Pricing Transparency
    While the pricing is flexible, some users have found it to be somewhat opaque and potentially confusing, especially for larger-scale operations.
  • Limited Free Trial
    The free trial period is relatively short, making it difficult for enterprises to fully evaluate the service before committing.
  • Advanced Features May Require Additional Costs
    Advanced features like real-time analytics and enhanced DDoS protection sometimes come at an additional cost, which might not be clear upfront.
  • Regional Performance Variance
    Although CDN77 has a robust global network, performance can vary depending on the region, with some locations experiencing slower speeds than others.

Analysis

An editorial look at what each product does well and who it suits.

SSS
Select Star SQL
CDN77

Overall verdict

  • Select Star SQL is an excellent free, interactive online book for learning SQL, praised for its engaging, hands-on approach that lets you write and run queries directly in the browser while working through a compelling real-world dataset.

Why this product is good

  • It's completely free and accessible online with no signup required
  • Features an interactive interface where you can write and execute SQL queries directly in the browser
  • Uses a compelling, thought-provoking dataset (Texas death row executions) that keeps learners engaged
  • Teaches SQL through active problem-solving rather than passive reading
  • Progresses logically from basic concepts to more advanced topics like window functions and self-joins
  • Includes exercises with solutions to reinforce learning
  • Well-written and clearly explained, making complex concepts approachable for beginners

Recommended for

  • Complete beginners who want to learn SQL from scratch
  • Self-taught learners who prefer hands-on, interactive practice
  • Students and professionals looking to build a solid foundation in querying databases
  • Aspiring data analysts and data scientists
  • Anyone wanting a free alternative to paid SQL courses
  • People who learn best by doing rather than just reading theory

No analysis of CDN77 yet.

Videos

Walkthroughs and reviews on video.

SSS
Select Star SQL 0 videos + Add
CDN77 2 videos + Add

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[Review Tech] Cdn77 review

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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
SSS
Select Star SQL
CDN77
100% 100%
0% 0%
0% 0%
CDN
100% 100%
100% 100%
0% 0%
0% 0%
100% 100%

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Reviews and articles

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

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