This is a tool to help visualize the output from Postgres' EXPLAIN ANALYZE query planner.
Some of the language on this tool is not in English, but it should still be quite easy to read for English speakers.
I post links to other self-study resources - all tagged under the following links - check them out to see more similar content!
I run this site, and manually add links to resources/articles that I think help with learning some aspect of software engineering.
I use this site for 2 reasons. First, so I can find links again! And also to hopefully help people out who want a nice curated list of nice resources, videos, books and links to learn software engineering