Check out MySQL workbench when you get a chance. It has an amazing tool for visualing SQL tables/rows/relationships (foreign keys).
I’ve been using navicat for years and never really looked into the tools that oracle came out with.
Workbench is nice however and it’s free to check out.
Also it has a tool to reverse engineer the sql diagrams so you can generate them directly from your existing database.
How cool is that!?