SET LINESIZE  145
SET PAGESIZE  9999
SET VERIFY    off

COLUMN role             FORMAT a30    HEAD 'Role Name'
COLUMN grantee          FORMAT a30    HEAD 'Grantee'
COLUMN admin_option     FORMAT a15    HEAD 'Admin Option?'
COLUMN default_role     FORMAT a15    HEAD 'Default Role?'

break on role skip 2

SELECT
    b.role
  , a.grantee
  , a.admin_option
  , a.default_role
FROM
    dba_role_privs  a
  , dba_roles       b
WHERE
    granted_role(+) = b.role
ORDER BY
    b.role
  , a.grantee
/