Oracle数据库文件属性查看及更改

--查看表空间名称、大小、使用大小、剩余大小和使用率： 

SELECT a.tablespace_name "表空间名称",  

total / (1024 * 1024) "表空间大小(M)",  

free / (1024 * 1024) "表空间剩余大小(M)", 

(total - free) / (1024 * 1024 ) "表空间使用大小(M)", 

total / (1024 * 1024 * 1024) "表空间大小(G)",  

free / (1024 * 1024 * 1024) "表空间剩余大小(G)", 

(total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)",  

round((total - free) / total, 4) * 100 "使用率 %"  FROM (SELECT tablespace_name, SUM(bytes) free

FROM dba_free_space  GROUP BY tablespace_name) a, 

(SELECT tablespace_name, SUM(bytes) total  FROM dba_data_files  GROUP BY tablespace_name) b 

WHERE a.tablespace_name = b.tablespace_name 









--更改表空间大小(例如改为10G)

ALTER DATABASE DATAFILE '/表空间路径/表空间文件名称.dbf' RESIZE 10240M； 



--查看表空间是否自动增长

SELECT FILE_NAME,TABLESPACE_NAME,AUTOEXTENSIBLE FROM dba_data_files; 





--设置表空间自动增长：  

 ALTER DATABASE DATAFILE '/表空间路径/表空间文件名称.dbf' AUTOEXTEND ON;

--打开自动增长   每次自动增长200M

ALTER DATABASE DATAFILE '/表空间路径/表空间文件名称.dbf' AUTOEXTEND ON NEXT 200M ;

-- 每次自动增长200M，表空间最大不超过1G

ALTER DATABASE DATAFILE '/表空间路径/表空间文件名称.dbf' AUTOEXTEND ON NEXT 200M MAXSIZE 1024M;

 

--1、查看表空间的名称及大小   

SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size FROM dba_tablespaces t, dba_data_files d WHERE t.tablespace_name = d.tablespace_name GROUP BY t.tablespace_name;

--2、查看表空间物理文件的名称及大小   

SELECT tablespace_name, file_id, file_name, round(bytes / (1024 * 1024), 0) total_space FROM dba_data_files ORDER BY tablespace_name;

--3、查看回滚段名称及大小 

SELECT segment_name,

tablespace_name,

r.status,

(initial_extent / 1024) initialextent,

(next_extent / 1024) nextextent,

max_extents,

v.curext curextent

FROM dba_rollback_segs r, v$rollstat v

WHERE r.segment_id = v.usn(+)

ORDER BY segment_name;

--4、查看控制文件 

SELECT NAME FROM v$controlfile; 

 

--5、查看日志文件 

SELECT MEMBER FROM v$logfile; 

 

--6、查看表空间的使用情况 

SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name

FROM dba_free_space

GROUP BY tablespace_name;

SELECT a.tablespace_name,

a.bytes total,

b.bytes used,

c.bytes free,

(b.bytes * 100) / a.bytes "% USED ",

(c.bytes * 100) / a.bytes "% FREE "

FROM sys.sm$ts_avail a, sys.sm$ts_used b, sys.sm$ts_free c

WHERE a.tablespace_name = b.tablespace_name

AND a.tablespace_name = c.tablespace_name;

--7、查看数据库库对象 

 

SELECT owner, object_type, status, COUNT(*) count#

FROM all_objects

GROUP BY owner, object_type, status;

--8、查看数据库的版本　 

 

SELECT version

FROM product_component_version

WHERE substr(product, 1, 6) = 'Oracle';

--9、查看数据库的创建日期和归档方式 

 

SELECT created, log_mode, log_mode FROM v$database;

--1G=1024MB

--1M=1024KB

--1K=1024Bytes

--1M=11048576Bytes

--1G=1024*11048576Bytes=11313741824Bytes

SELECT a.tablespace_name "表空间名",

total "表空间大小",

free "表空间剩余大小",

(total - free) "表空间使用大小",

total / (1024 * 1024 * 1024) "表空间大小(G)",

free / (1024 * 1024 * 1024) "表空间剩余大小(G)",

(total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)",

round((total - free) / total, 4) * 100 "使用率 %"

FROM (SELECT tablespace_name, SUM(bytes) free

FROM dba_free_space

GROUP BY tablespace_name) a,

(SELECT tablespace_name, SUM(bytes) total

FROM dba_data_files

GROUP BY tablespace_name) b

WHERE a.tablespace_name = b.tablespace_name

 转载：https://blog.csdn.net/ak57193856/article/details/79194011