use master
go
--Get all logins with sysadmin role.
select b.name,b.type,b.type_desc,c.name
from sys.server_role_members a
inner join sys.server_principals b
on a.member_principal_id = b.principal_id
inner join sys.server_principals c
on a.role_principal_id = c.principal_id
where c.name = 'sysadmin' and c.type='R'
go
use test
go
--Get database users with db_owner role
select b.name,b.type,b.type_desc,c.name
from sys.database_role_members a
inner join sys.database_principals b
on a.member_principal_id = b.principal_id
inner join sys.database_principals c
on a.role_principal_id = c.principal_id
where c.name='db_owner' and c.type='R'
来源：https://www.cnblogs.com/Roy_Zhou/archive/2010/07/31/1789615.html