Query: blockstorage_block_volume_unattached_report

select
  v.display_name as "Name",
  a.lifecycle_state as "Attachment Status",
  i.display_name as "Instance Name",
  t.title as "Tenancy",
  coalesce(c.title, 'root') as "Compartment",
  v.region as "Region",
  v.id as "OCID"
from
  oci_core_volume as v
  left join oci_core_volume_attachment as a on a.volume_id = v.id
  left join oci_core_instance as i on a.instance_id = i.id
  left join oci_identity_compartment as c on v.compartment_id = c.id
  left join oci_identity_tenancy as t on v.tenant_id = t.id
where
  v.lifecycle_state <> 'TERMINATED'
order by
  v.display_name;