In cleaning up our long list of cv domains in our 5 geodatabases, we wanted a quick way to list the domains and what feature class(es) they were assigned to. I searched online but didn't find anything, so we came up with this little query to list our feature classes with associated domains. No question - just sharing. Hope this can help someone in the future.
SELECT I.Name as "CV Domain Name", I.Type, RI.Name as "Feature Class Name"
FROM [GDBName].[sde].[GDB_ITEMS] as I
Left Outer Join
(SELECT I.Name, OriginID, DestID
FROM [GDBName].[sde].[GDB_ITEMRELATIONSHIPS] as R
Inner Join [GDBName].[sde].[GDB_ITEMS] as I
On r.OriginID = I.UUID) as RI
On I.UUID = RI.DestID
where i.Type = '8C368B12-A12E-4C7E-9638-C9C64E69E98F' --This Type is Coded Value Domain
Order by I.Name, RI.Name