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38.15. Oracle 表空间

38.15.1. 查询空闲表空间

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.		
		
		

38.15.2. 创建表空间

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表示区的大小相同,默认为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表示区的大小相同,为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 表示区的大小由随表的大小自动动态改变

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

temporary 创建字典管理临时表空间

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

例 38.2. 创建表空间实例

			
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.			
			
			

38.15.2.1. 临时表空间

创建临时表空间,语句中的datafile都换为tempfile

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

38.15.3. 更改表空间属性

更改自动扩展属性

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

38.15.3.1. 修改表空间大小

先查询数据文件名称、大小和路径的信息,语句如下:

select tablespace_name,file_id,bytes,file_name from dba_data_files;

增加表空间,修改文件大小语句如下

alter database datafile '需要增加的数据文件路径,即上面查询出来的路径 ' resize 800M;
			

38.15.4. 删除表空间

drop tablespace "空间名" including contents and datafiles

drop tablespace test including contents and datafiles