Looking at the dbc.roles table, I want to find which user created a role. There is the 4-byte column in the table called CreateUID, which identifies the user that created the role. Wanting the user name, I struggled to find a matching column in the view dbc.users or dbc.databases views to link for the column CreateUID.
Using the dbc.dbase table, I was able to link the CreateUID to a DatabaseID to find out the user name.
sel R.ROLENAME, D.DatabaseNameI as "OWNER" from dbc.roles R inner join dbc.dbase D on R.CreateUID = D.DATABASEID order by 1