查看oracle表空间

SELECT c.tablespace_name tablespace_name, ROUND(a.bytes/1048576,2) total_size,ROUND((a.bytes-b.bytes)/1048576,2) used_size,
ROUND(b.bytes/1048576,2) free_size, 
ROUND(b.bytes/a.bytes * 100,2)||'%' free_pct FROM 
(SELECT tablespace_name,SUM(a.bytes) bytes 
FROM sys.DBA_DATA_FILES a 
GROUP BY tablespace_name) a, 
(SELECT a.tablespace_name, 
NVL(SUM(b.bytes),0) bytes 
FROM sys.DBA_DATA_FILES a, 
sys.DBA_FREE_SPACE b 
WHERE a.tablespace_name = b.tablespace_name (+) 
AND a.file_id = b.file_id (+) 
GROUP BY a.tablespace_name) b, 
sys.DBA_TABLESPACES c 
WHERE a.tablespace_name = b.tablespace_name(+) 
AND a.tablespace_name = c.tablespace_name 
ORDER BY ROUND(b.bytes/1048576,2);

select 
a.a1 表空间名称,
c.c2 类型,
c.c3 区管理,
b.b2/1024/1024 表空间大小M,
(b.b2-a.a2)/1024/1024 已使用M,
substr((b.b2-a.a2)/b.b2*100,1,5) 利用率
from 
(select  tablespace_name a1, sum(nvl(bytes,0)) a2 from dba_free_space group by tablespace_name) a,
(select tablespace_name b1,sum(bytes) b2 from dba_data_files group by tablespace_name) b,
(select tablespace_name c1,contents c2,extent_management c3  from dba_tablespaces) c 
where a.a1=b.b1 and c.c1=b.b1;

SELECT DBName.name,
  sysdate,
  Total.name "Tablespace Name",
  num_db_files,
  Free_space,
  ((100 * Free_space) / total_space) "%Free",
  (total_space - Free_space) Used_space,
  ((100 * (total_space - free_space)) / total_space) "%Used",
  total_space
  FROM (select tablespace_name, sum(bytes / 1024) Free_Space
  from sys.dba_free_space
  group by tablespace_name) Free,
  (select b.name, count(*) num_db_files, sum(bytes / 1024) TOTAL_SPACE
  from sys.v_$datafile a, sys.v_$tablespace B
  where a.ts# = b.ts#
  group by b.name) Total,
  (select name from sys.v_$database) DBName
 WHERE Free.Tablespace_name = Total.name
  and DBName.name = DBName.name;