Are there any good tools for visualising a pre-existing database schema? I'm using MySQL if it matters.
I'm currently using MySQL Workbench to process an SQL create script dump, but it's clunky, slow and a manual process to drag all the tables about (which would be okay if it wasn't so slow).
I found SchemaSpy quite good - you have to run the script every time schema changes but it is not so big deal.
As pointed out in the comments there is also a GUI for it.
Another nice tool is SchemaCrawler.