33.12. Oracle 表空間

33.12.1. 查詢空閒表空間

select tablespace_name,file_id,block_id,bytes,blocks from dba_free_space;		

		SQL> select file_name from dba_data_files;

FILE_NAME
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
/opt/oracle/oradata/orcl/users01.dbf
/opt/oracle/oradata/orcl/undotbs01.dbf
/opt/oracle/oradata/orcl/sysaux01.dbf
/opt/oracle/oradata/orcl/system01.dbf
/opt/oracle/oradata/orcl/example01.dbf
/opt/oracle/oradata/orcl/neo.dbf

6 rows selected.		
 

33.12.2. 建立表空間

create tablespace test
datafile '/opt/app/oracle/oradata/test.dbf' size 8M
autoextend on
next 5M
maxsize 10M;		

maxsize unlimited 是大小不受限制

create tablespace test
datafile '/opt/app/oracle/oradata/test.dbf' size 800M
autoextend on
next 50M
maxsize unlimited		

unform表示區的大小相同，預設為1M

create tablespace test
datafile '/opt/app/oracle/oradata/test.dbf' size 800M
autoextend on
next 50M
maxsize 1000M
extent management local uniform;		
 

unform size 500K表示區的大小相同，為500K

create tablespace test
datafile '/opt/app/oracle/oradata/test.dbf' size 800M
autoextend on
next 50M
maxsize 1000M
extent management local uniform size 500K;		

autoallocate 表示區的大小由隨表的大小自動動態改變

create tablespace test
datafile '/opt/app/oracle/oradata/test.dbf' size 800M
autoextend on
next 50M
maxsize 1000M
extent management local autoallocate;		
 

temporary 建立字典管理臨時表空間

create tablespace test
datafile '/opt/app/oracle/oradata/test.dbf' size 800M
autoextend on
next 50M
maxsize 1000M
temporary;		

例 33.2. 建立表空間例項

			SQL> create tablespace ts_b01_def datafile '/opt/oracle/oradata/orcl/ts_b01_def.dbf' size 100m autoextend on;

Tablespace created.

SQL> create tablespace ts_b01_idx datafile '/opt/oracle/oradata/orcl/ts_b01_idx.dbf' size 100m autoextend on;

Tablespace created.			

33.12.2.1. 臨時表空間

建立臨時表空間，語句中的datafile都換為tempfile

create temporary tablespace test
tempfile '/opt/app/oracle/oradata/test.dbf' size 800M
autoextend on
next 50M
maxsize 1000M			

33.12.3. 更改表空間屬性

更改自動擴充套件屬性

alter database datafile
    '/opt/app/oracle/oradata/test.dbf',
    '/opt/app/oracle/oradata/test01.dbf'
    '/opt/app/oracle/oradata/test02.dbf'
    autoextend off;		

33.12.3.1. 修改表空間大小

先查詢資料檔名稱、大小和路徑的資訊，語句如下：

select tablespace_name,file_id,bytes,file_name from dba_data_files;

增加表空間，修改檔案大小語句如下

alter database datafile '需要增加的資料檔案路徑，即上面查詢出來的路徑 ' resize 800M;			

33.12.4. 刪除表空間

drop tablespace "空間名" including contents and datafiles

drop tablespace test including contents and datafiles