SQL Fiddle
ExtendsClass SQL Online
OnlineGDB
Judge0 IDE
JDoodle
Sphere Engine
replit
Online compiler for many languages, including MySQL

Airtable
mlsql
SQL Chat
Fieldbook
sqlTranslate
Outerbase
TablePlus
Communicate with databases like a human
Which is more popular?
Based on our record, Rextester seems to be more popular. It has been mentioned 7 times since March 2021.
Website, pricing, platforms and company facts side by side.
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Rextester
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| Website | insurance.rextester.com | friendlydata.io |
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What each product offers, as listed by its team.

No features have been listed yet.
Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.

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

It supports around 30 languages including Java, but it is more popular among C# users. Rextester started as a Regular Expression Tester, later grew to be an online IDE.
We have no reviews of FriendlyData yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

My Professor has not provided any resources or material to help complete this project, I have tried to problem solve, use the internet, even chatgpt. (I can send the code that it gave me in comments if needed, but ) I need help... Source: over 3 years ago
Does it really do that? (I've just tried in rextester.com, it complains about declared but unused variables.). Source: almost 4 years ago
(A quick survey of some of the languages at rextester.com showed that they are usually counted from 1. I'd suggest doing the same would be least surprising.). Source: over 4 years ago
Tracking FriendlyData since Mar 2021.
When comparing Rextester and FriendlyData, you can also consider the following products.

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Online SQL playground for testing and sharing SQL snippets. SQLite, MySQL and PostgreSQL.
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Infer SQL queries from plain-text questions and table headers.
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OnlineGDB.com is an online compiler and debugger tool for C/C++.
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Chat-based SQL Client and Editor for the next decade
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