Check out db-fiddle.com
It’s a web app that lets you execute SQL against different database engines with no login required.
I thought I’d share since this was a huge help to me when writing answers on the forum. I figure out how to solve the problem in my database of choice (Postgres) but I can use DB Fiddle to experiment with SQLite and MySQL and make sure my code samples are good.
Before DB Fiddle I would spin up a docker container for this, which was time-consuming.