The best alternatives to Upsolver SQLake are DataQuest Beta, SQL Cards, and Notion SQL Learning. If these 3 options don't work for you, we've listed a few more alternatives below.
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Enterprise Ready Conference by WorkOS— For prod/eng leaders —speakers from OpenAI, Vanta, Canva
SQL Cards is a set of cards that help you to learn — or teach — the SQL language used to query relational databases. This is free under CC BY-NC-SA 4.0 license.
Are you looking for a way to save time and fast-track your SQL learning? Notion SQL Learning is designed to be simple and easy to follow so that you can start learning SQL quickly.
SQL Police Department is an online game where you solve crimes using SQL (and learn SQL on the way). As you solve more cases, you advance in the ranks of SQL Police Department and learn more SQL.
Beautiful SQL runner app for those who want to run SQL commands in their phone. It comes with a sample database so that you can run all sorts of query to the employee, customer, songs and artists.