DROP SERVER ROLE (Transact-SQL)
Removes a user-defined server role.
User-defined server roles are new in SQL Server 2012.
User-defined server roles that own securables cannot be dropped from the server. To drop a user-defined server role that owns securables, you must first transfer ownership of those securables or delete them.
User-defined server roles that have members cannot be dropped. To drop a user-defined server role that has members, you must first remove members of the role by using ALTER SERVER ROLE.
Fixed server roles cannot be removed.
You can view information about role membership by querying the sys.server_role_members catalog view.
A. To drop a server role
The following example drops the server role purchasing.
DROP SERVER ROLE purchasing; GO
B. To view role membership
To view role membership, use the Server Role (Members) page in SQL Server Management Studio or execute the following query:
SELECT SRM.role_principal_id, SP.name AS Role_Name, SRM.member_principal_id, SP2.name AS Member_Name FROM sys.server_role_members AS SRM JOIN sys.server_principals AS SP ON SRM.Role_principal_id = SP.principal_id JOIN sys.server_principals AS SP2 ON SRM.member_principal_id = SP2.principal_id ORDER BY SP.name, SP2.name
C. To view role membership
To determine whether a server role owns another server role, execute the following query:
SELECT SP1.name AS RoleOwner, SP2.name AS Server_Role FROM sys.server_principals AS SP1 JOIN sys.server_principals AS SP2 ON SP1.principal_id = SP2.owning_principal_id ORDER BY SP1.name ;