id, resource_key, content_type, original_filename, uid_filename, byte_size, path SELECT FROM storage_blob sb LEFT JOIN storage_attachment sa ON sa.storage_blob_id = sb.id AND sa.deleted = 0 WHERE sb.id ]]> #{lastId} AND sa.id IS NULL ORDER BY sb.id ASC LIMIT #{limit} DELETE FROM storage_blob WHERE id IN #{id} SELECT uid_filename FROM storage_blob WHERE uid_filename IN #{fileName}