--、查看Oracle数据库中数据文件信息的命令方法

select

b.file_name 物理文件名,

b.tablespace_name 表空间,

b.bytes// 大小M,

(b.bytes-sum(nvl(a.bytes,)))//  已使用M,

substr((b.bytes-sum(nvl(a.bytes,)))/(b.bytes)*,,)  利用率

from dba_free_space a,dba_data_files b

where a.file_id=b.file_id

group by b.tablespace_name,b.file_name,b.bytes

order by b.tablespace_name

--、

select * from dba_data_files;

--、

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 * ,),'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) / ( * ), ) TOTAL_BYTES,

ROUND(MAX(BYTES) / ( * ), ) MAX_BYTES

FROM SYS.DBA_FREE_SPACE

GROUP BY TABLESPACE_NAME) F,

(SELECT DD.TABLESPACE_NAME,

ROUND(SUM(DD.BYTES) / ( * ), ) TOT_GROOTTE_MB

FROM SYS.DBA_DATA_FILES DD

GROUP BY DD.TABLESPACE_NAME) D

WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME

ORDER BY ;

SELECT ROUND(SUM(BYTES)///,)||'GB'

FROM DBA_DATA_FILES;

SELECT SUM(BYTES)/// AS GB

FROM DBA_TEMP_FILES;

SELECT SUM(BYTES)/// AS GB

FROM V$LOG;

SELECT SUM(GB) AS GB

FROM(

     SELECT SUM(BYTES)/// AS GB

     FROM DBA_DATA_FILES

     UNION ALL

     SELECT SUM(BYTES)///

     FROM DBA_TEMP_FILES

     UNION ALL

     SELECT SUM(BYTES)///

     FROM V$LOG

     );