SQL School might be a bit more popular than db<>fiddle. We know about 19 links to it since March 2021 and only 19 links to db<>fiddle. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Also, reducing your problem down to a minimal reproducible example, along with some sample data (and ideally a http://sqlfiddle.com/ or https://dbfiddle.uk/ link) will get you much better answers. Source: about 1 year ago
Http://dbfiddle.uk has an AdventureWorks test DB that you could use. Source: about 1 year ago
If you used https://dbfiddle.uk to create a table, load it up with a minimum set of representative rows, then created a minimal, yet representative "first query" and then mocked up what you want your "second query"'s output to look like based on the example data, it might be way easier to comprehend what you are talking about. Source: over 1 year ago
Put it in a fiddle, like dbfiddle.uk or sqlfiddle.com. Source: over 1 year ago
I don't mean to take anything away from this post - its quite amazing and I can't wait to play with it more - but wanted to mention that there are sites out there that I believe solve the training portion maybe a little bit better, at least if all you want is to train on SQL not DBA type actions. My favorite is https://dbfiddle.uk/ - the ability to link and fork a set of statements is extremely handy. - Source: Hacker News / over 1 year ago
Tutorials: Many websites offer free SQL tutorials and exercises, such as SQLZoo and Mode Analytics. Source: over 1 year ago
Follow this tutorial. Sign up for a free account and follow along in the Mode report editor. Solve all the practice problems along the way. Source: over 1 year ago
If you are looking to practice your SQL skills, I like Mode to give you a good understanding of the basics as well as the advanced concepts. In this situation, I would simply learn to the test. Source: over 1 year ago
If youre learning SQL for the first time -> mode analytics is my favorite Especially for data analytics, great place to start and I recommend doing beginner and moderate levels. Source: over 1 year ago
I recommend this tutorial to all SQL beginners. My partner, who also had no background in programming, found this very helpful. Source: over 1 year ago
SQL Fiddle - A tool for easy online testing and sharing of database problems and their solutions.
DrawSQL - Easy database diagrams. Create, visualize and collaborate on your database entity relationship diagrams.
Online SQL Editor - Free Online SQL Editor
SQLBolt - SQLBolt provides a set of interactive lessons and exercises to help you learn SQL
DB Fiddle - An online tool for testing, sharing and collaborating on SQL snippets
Numeracy - A SQL pad that gives you x-ray vision for your data