I've tried a few searches and can't find it but it feels like it should exist.<p>Is there a Codepen style (online playpen) SQL server and GUI client thing? Let's you make a toy database and query it within your browser, and persist the data against an obscure URL.
I found <a href="https://www.db-fiddle.com" rel="nofollow noreferrer">https://www.db-fiddle.com</a> but it doesn't have the GUI element to let you navigate around the tables.