I tried to migrate a SQL Server database by Export Data-tier Application (.bacpac
file) from an Amazon RDS instance to other, but import didn\'t succeed. So now
I ran into this same issue. After trying to restore a database via SSMS using a .bacpac, it fails and leaves you with a database that you appear to not have permissions to drop.
A workaround, is to use the rdsadmin rename function to rename it to something else, which then seems to fix the permission issue and allows you to drop it.
EXEC rdsadmin.dbo.rds_modify_db_name N'', N''
Then just drop the DB. Hope that helps someone else in the same predicament.