Stephen Grider made a cool website[0] that allows people to make and use databases using PostgreSQL statements for his udemy course[1] about SQL. It's great for learning and testing and has been around a while so I feel like he should get some attention/credit too
I’d love to see udemy courses on postgresql administration beyond the basics… I’d love something to get you to, say, a junior-level dba. Focused on postgresql of course.
[0] pg-sql.com/
[1] https://www.udemy.com/course/sql-and-postgresql/