how to run this query

suppose i have no access to dba_* views or tables, then how to run this query:---


SELECT
a.file_id,
substr(a.tablespace_name,1,14) tablespace_name,
trunc(decode(a.autoextensible,'YES',a.maxsize-a.bytes+b.free,'NO',b.free)/1024/1024) free_mb,
trunc(a.bytes/1024/1024) size_mb,
trunc(a.maxsize/1024/1024) maxsize_mb,
a.autoextensible ae,
trunc(decode(a.autoextensible,'YES',(a.maxsize-a.bytes+b.free)/a.maxsize*100,'NO',b.free/a.maxsize*100)) free_pct
FROM
(SELECT file_id,
tablespace_name,
autoextensible,
bytes,
decode(autoextensible,'YES',maxbytes,bytes) maxsize
FROM dba_data_files
GROUP BY file_id,
tablespace_name,
autoextensible,
bytes,
decode(autoextensible,'YES',maxbytes,bytes)) a,
(SELECT file_id,
tablespace_name,
sum(bytes) free
FROM dba_free_space
GROUP BY file_id,
tablespace_name) b
WHERE a.file_id=b.file_id(+)
AND a.tablespace_name=b.tablespace_name(+)
ORDER BY a.tablespace_name ASC;

you dont