oracle查看表空间和物理文件大小

查看各表空间的使用情况

select a.tablespace_name,a.bytes/1024/1024 "Sum MB",(a.bytes-b.bytes)/1024/1024 "used MB",b.bytes/1024/1024 "free MB",
round(((a.bytes-b.bytes)/a.bytes)*100,2) "percent_used"
from
(select tablespace_name,sum(bytes) bytes from dba_data_files group by tablespace_name) a,
(select tablespace_name,sum(bytes) bytes,max(bytes) largest from dba_free_space group by tablespace_name) b
where a.tablespace_name=b.tablespace_name
order by ((a.bytes-b.bytes)/a.bytes) desc

select * from dba_data_files
order by tablespace_name, file_name;

select tablespace_name,dba_tablespaces.* from dba_tablespaces

select OWNER, t.segment_name, t.segment_type,
sum(t.bytes / 1024 / 1024/1024) USED_G
from dba_segments t
where t.owner LIKE '%ODS%'
AND SEGMENT_NAME NOT LIKE 'BIN$%'
group by OWNER, t.segment_name, t.segment_type
order by OWNER, USED_G desc;

--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;

alter tablespace {表空间名字} add datafile '物理数据文件路径' SIZE 『初始大小M』 AUTOEXTEND ON NEXT 『自动扩展大小M』

alter tablespace SDK_TB add datafile '/oradata/ORA11G/sdk_tb2.dbf' size 1000m autoextend on next 200m

Alter tablespace SDK_TB drop datafile '/oradata/ORA11G/a_tb04.dbf';
或者
alter database datafile '/oradata/ORA11G/a_tb04.dbf' offline drop;