oracle查询数据库表空间使用情况

select upper(f.tablespace_name) "表空间名",
       d.tot_grootte_mb "表空间大小(m)",
       d.tot_grootte_mb - f.total_bytes "已使用空间(m)",
       to_char(round((d.tot_grootte_mb - f.total_bytes) / d.tot_grootte_mb * 100,
                     2),
               '990.99') "使用比",
       f.total_bytes "空闲空间(m)",
       f.max_bytes "最大块(m)"
  from (select tablespace_name,
               round(sum(bytes) / (1024 * 1024), 2) total_bytes,
               round(max(bytes) / (1024 * 1024), 2) max_bytes
          from sys.dba_free_space
         group by tablespace_name) f,
       (select dd.tablespace_name,
               round(sum(dd.bytes) / (1024 * 1024), 2) tot_grootte_mb
          from sys.dba_data_files dd
         group by dd.tablespace_name) d
 where d.tablespace_name = f.tablespace_name
 order by 4 desc;

select t.tablespace_name,
       d.file_name,
       d.autoextensible,
       d.bytes,
       d.maxbytes,
       d.status
  from dba_tablespaces t, dba_data_files d
 where t.tablespace_name = d.tablespace_name
 order by tablespace_name, file_name;