Oracle 查询库文件信息

--、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
     );