
LeetCode
Codility
CodeSignal
iMocha
Codewars
HackerEarth
TestGorilla
HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.

SQLBolt
Codecademy
Egghead
Tutorialzine
Progate
TutorialsTeacher
ExamTray
SQLZoo includes tutorials and reference to support people learning SQL. It features:

Which is more popular?
Based on our record, HackerRank should be more popular than SQLZOO. It has been mentioned 67 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | hackerrank.com | sqlzoo.net |
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What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
HackerRank is recommended for students, individual learners, and job seekers looking to improve their coding skills, as well as for companies seeking an efficient way to evaluate candidates' technical abilities during the hiring process.
No analysis of SQLZOO yet.
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SQLZOO Select from Nobel
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using HackerRank and SQLZOO. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


What are LeetCode and LeetCode alternatives good for?LeetCode💡Interested in leveling up your career? Apply to the Formation Fellowship...
HackerRank’s challenges cover a wide range of topics and difficulty levels, allowing developers to enhance their problem-solving skills and learn new algorithms and data structures. The competitive nature of...
HackerRank offers a wide array of challenges across various domains such as algorithms, mathematics, SQL, and functional programming. Its interface is user-friendly, and the platform provides detailed feedback on...
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...
Recommendations tracked on public social media and blogs since March 2021.


This way, you transfer what you already know (problem-solving) but only change the syntax. Platforms like Hackerrank are also great to solve the same problem in different languages and learn from other people’s solutions. - Source: dev.to / about 1 year ago
Firstly, solve some common data structure problems with it. Implement some data structures like arrays, linked lists, stacks, queues, etc. You can check common problems on LeetCode, Hackerank or some other resources. - Source: dev.to / over 2 years ago
I don't have a consecutive internet connection and I can't keep up learning process so I started practicing in hackerrank.com I have started some challenges in python and c++ there. Thus I have no internet connection so I cannot practice... Source: almost 3 years ago
Https://sqlzoo.net/ is one of my faves. Source: about 5 years ago
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
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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