Oracle 查询库文件信息

--1、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/1024/1024 大小M,
(b.bytes-sum(nvl(a.bytes,0)))/1024/1024  已使用M,
substr((b.bytes-sum(nvl(a.bytes,0)))/(b.bytes)*100,1,5)  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

--2、
select * from dba_data_files;

--3、
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 1;


SELECT ROUND(SUM(BYTES)/1024/1024/1024,2)||'GB' 
FROM DBA_DATA_FILES;

SELECT SUM(BYTES)/1024/1024/1024 AS GB 
FROM DBA_TEMP_FILES;

SELECT SUM(BYTES)/1024/1024/1024 AS GB 
FROM V$LOG;

SELECT SUM(GB) AS GB
FROM(
     SELECT SUM(BYTES)/1024/1024/1024 AS GB 
     FROM DBA_DATA_FILES
     UNION ALL
     SELECT SUM(BYTES)/1024/1024/1024
     FROM DBA_TEMP_FILES
     UNION ALL
     SELECT SUM(BYTES)/1024/1024/1024
     FROM V$LOG
     );