Oracle 表空间的操作

1.查看表空间的信息

select f.tablespace_name,a.total,u.used,f.free,round((u.used/a.total)*100) "% used",
  round((f.free/a.total)*100) "% Free" 
  from
  (select tablespace_name, sum(bytes/(1024*1024)) total 
       from dba_data_files group by tablespace_name) a,
  (select tablespace_name, round(sum(bytes/(1024*1024))) used 
       from dba_extents group by tablespace_name) u,
  (select tablespace_name, round(sum(bytes/(1024*1024))) free 
       from dba_free_space group by tablespace_name) f
WHERE a.tablespace_name = f.tablespace_name
and a.tablespace_name = u.tablespace_name; 

2.创建表空间

SQL> create tablespace testspace    
datafile 'd:/OracleTest/test001.dbf' size 10m autoextend on next 5m maxsize unlimited    
extent management local ;  

2.给表空间添加数据文件

SQL> alter tablespace testspace add datafile 'd:/OracleTest/test002.dbf' size 5m    
autoextend on next 3m maxsize 50m;   

SQL> alter tablespace testspace add datafile 'd:/OracleTest/test002.dbf' size 5m 
autoextend on next 3m maxsize 50m; 

3.删除表空间中的数据文件

SQL> alter tablespace testspace drop datafile 'd:/OracleTest/test002.dbf';   

SQL> alter tablespace testspace drop datafile 'd:/OracleTest/test002.dbf'; 

4.修改表空间文件的数据文件大小

SQL> alter database datafile 'd:/OracleTest/test001.dbf' resize 10m;  

SQL> alter database datafile 'd:/OracleTest/test001.dbf' resize 10m;

5.修改表空间数据文件的自动增长属性

SQL> alter database datafile 'd:/OracleTest/test001.dbf' autoextend off;   

SQL> alter database datafile 'd:/OracleTest/test001.dbf' autoextend off; 

6.修改表空间的读写属性

SQL> alter tablespace testspace read only;(只读)    
  
SQL> alter tablespace testspace read write;(读写)   

SQL> alter tablespace testspace read only;(只读) 

SQL> alter tablespace testspace read write;(读写) 

7.设置表空间脱/联机

SQL> alter tablespace testspace offline;    
  
SQL> alter tablespace testspace online;   

SQL> alter tablespace testspace offline; 

SQL> alter tablespace testspace online; 

8.转移物理文件路径的操作

(1)设置表空间脱机 alter tablespac testspace offline;    
  
(2)物理转移表空间文件;即把你的表空间物理文件转移到你想移动的路径    
  
(3)逻辑转移:alter tablespace testspace rename datafile 'd:/OracleTest/test001.dbf' to 'e:/test001.dbf';    
  
(4)设置表空间联机 alter tablespace testspace online;   

(1)设置表空间脱机 alter tablespac testspace offline; 

(2)物理转移表空间文件;即把你的表空间物理文件转移到你想移动的路径 

(3)逻辑转移:alter tablespace testspace rename datafile 'd:/OracleTest/test001.dbf' to 'e:/test001.dbf'; 

(4)设置表空间联机 alter tablespace testspace online; 

9.删除表空间

(1)不删文件 drop tablespace testspace;    
  
(2)删除文件 drop tablespace testspace including contents and datafiles;   

(1)不删文件 drop tablespace testspace; 

(2)删除文件 drop tablespace testspace including contents and datafiles; 

10.物理文件被非法删除时,怎样启动数据库

(1)关闭数据库服务 shutdown    
  
(2)alter database datafile 'd:/test001.dbf' offline drop;    
  
(3)alter database open;    
  
(4)开启数据库服务 startup;   

11、查看表空间名

Select distinct Tablespace_Name from tabs;   
select tablespace_name from user_tablespaces;  

实例: 创建表时关联表空间

-- Create tablespace
create tablespace tab_news datafile 'F:\oradata\NPMS\tab_news.dbf' size 5m autoextend on next 2m maxsize unlimited extent management local;

autoextend on next 2m 代表 以2m的大小自增

-- Create table
create table NEWS_BBS
(
  BBSID       NUMBER(10) not null,
  PROJECT     VARCHAR2(128) not null,
  USERID      NUMBER(10),
  CONTENT     CLOB,
  ANSWERID    NUMBER(10),
  ANSWERCOUNT NUMBER(10),
  PUBLISHTIME DATE
)
tablespace NEWS_TAB
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 64
    minextents 1
    maxextents unlimited
  );

-- Create/Recreate primary, unique and foreign key constraints 
alter table NEWS_BBS
  add constraint PK_NEWS_BBS primary key (BBSID)
  using index 
  tablespace ET_TAB
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    minextents 1
    maxextents unlimited
  );