I've used sqlbolt.com! It's great. Very easy to follow and it's interactive. They have a resource for regex: https://regexone.com/ https://regexone.com/, which

I've used sqlbolt.com! It's great. Very easy to follow and it's interactive. They have a resource for regex: https://regexone.com/ https://regexone.com/, which I've gone through as well!