oracle查询临时表空间使用情况

select h.tablespace_name tablespace_name,f.autoextensible,
               round(sum(nvl(p.bytes_used, 0)) / power(2, 30), 2) used_gb,
               round(sum(decode(f.autoextensible, ‘YES’,  f.maxbytes, ‘NO’, f.bytes)) / power(2, 30), 2) max_gb
          from v$temp_space_header h, v$temp_extent_pool p, dba_temp_files f
         where p.file_id(+) = h.file_id
           and p.tablespace_name(+) = h.tablespace_name
           and f.file_id = h.file_id
           and f.tablespace_name = h.tablespace_name
         group by h.tablespace_name,f.autoextensible