If you ask this at HN most likely it will be PostgreSQL. If you ask scripting language it got to be python or javascript here. I use HN daily and noticed as a group, HN readers do in general have their preference on things like this. By all means, MySQL's market share is much larger than PostgreSQL, and MySQL 8+ is very impressive. I compared both and eventually picked MySQL for my projects, even though I really _hat…
You could use Percona MySQL, which isn't by Oracle and is much better anyway.