This enquiry pops upwardly instantly together with then. dbo is a user together with db_owner is a database role. They both are inwards the Security node inwards the Object Browser. The SQL Server Management Studio (SSMS) makes it abundantly clear. dbo dbo.png db_owner db_owner.png It volition live on instructive to review their properties every moment shown here. dbo - Properties dboProps.png db_owner - Properties db_ownerProps.png