SQL School
SQLBolt
PopSQL
Numeracy
Slack SQL
SQL Fiddle
Control
Superintendent.app
Code Arcade
CodinGame
hackattic
Daily Coding Problem
Frontloops
Code Racer
Real Dev
Codewars
SQL SchoolBased on our record, SQL School should be more popular than Code Arcade. It has been mentiond 19 times since March 2021. 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.
Tutorials: Many websites offer free SQL tutorials and exercises, such as SQLZoo and Mode Analytics. Source: over 3 years 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 3 years 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 3 years 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 3 years ago
I recommend this tutorial to all SQL beginners. My partner, who also had no background in programming, found this very helpful. Source: over 3 years ago
You can practice your code solving skills here: Https://app.codesignal.com/arcade Https://leetcode.com/problemset/all/. Source: over 3 years ago
CodeSignal's Arcade (signup required) has a lot of practice problems at different levels that can help break you out of the mindset of copying tutorial code. Source: over 4 years ago
I like the Databases section of CodeSignal Arcade. Problems increase in difficulty, plus I've found it's the platform a lot of companies use for SQL assessment so you'll get a good sense of the type of questions to expect. Source: over 4 years ago
Codesignal has a good set of SQL questions. Not sure they "support" Postgres, but there's 84 free levels under the Arcade section. https://app.codesignal.com/arcade. Source: almost 5 years ago
SQLBolt - SQLBolt provides a set of interactive lessons and exercises to help you learn SQL
CodinGame - CodinGame provides users with a fun and effective way to learn coding that eschews the rigid structure of traditional teaching methods.
PopSQL - Modern SQL editor for teams
hackattic - No nonsense, real world programming challenges
Numeracy - A SQL pad that gives you x-ray vision for your data
Daily Coding Problem - Get exceptionally good at coding interviews