Is there any way I can see the layout of the database for each Phabricator application and their tables and the columns of each of the tables? I don't want to have to install Phabricator myself just to view the tables.
We don't maintain such a document, but you could build the schema by only following the "database" parts of the manual (getting the code and running ./bin/storage upgrade) and dumping the whole schema.
There's a "quickstart.sql" file that is sometimes created in this way - it's currently more-or-less up to date.
Then you can use any tool you have to view this schema...
I used MySQL Workbench to reverse engineer quickstart.sql and create diagrams for each DB, hopefully that's helpful. See my recent uploads for the SVGs.
@Dylsss Wow. It would be nice to upload such files into Wikimedia Commons, since it renders SVG files.
Maybe in a sub-category here?