
db<>fiddle
DB Fiddle
SQLBolt
ExtendsClass SQL Online
Online SQL Editor
Ghostbin
FastTools SQLite Playground
A tool for easy online testing and sharing of database problems and their solutions.

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

Which is more popular?
HackerRank might be a bit more popular than SQL Fiddle. We know about 67 links to it since March 2021 and only 60 links to SQL Fiddle.
Website, pricing, platforms and company facts side by side.
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| Website | sqlfiddle.com | hackerrank.com |
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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.


No analysis of SQL Fiddle yet.
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.
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Is HackerRank A Good Idea?
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How often each product is chosen within a category, 0–100% relative to the other.


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


SQL Fiddle is also one of the best online database tools for testing your databases and sharing the problems and the solutions. You can test and compare your SQL queries against different database engines, including...
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...
Recommendations tracked on public social media and blogs since March 2021.


Tools like db<>fiddle and SQL Fiddle allow you to write and test queries in a live environment without needing a local database setup. You can share your SQL examples with others by providing them with a unique link to your query. - Source: dev.to / over 1 year ago
You can play for free (slow but workable) right here: Http://sqlfiddle.com/. Source: almost 3 years ago
I'm trying to get from a table which primary key aren't in the table, I use SQL Fiddle which runs MySql 5.6. Source: almost 3 years ago
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
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Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
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SQLBolt provides a set of interactive lessons and exercises to help you learn SQL
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CodeSignal is the leading assessment platform for technical hiring.
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