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5.Oracle-表空间
2022-07-05 06:20:00 【寒叶飘逸_】
- 创建一个本地管理方式下自动分区管理的表空间USERTBS1,对应的数据文件为20m
create tablespace usertbs1 datafile 'D:\app\Snakewood\oradata\orcl\usertbs1.dbf' size 20m;
- 创建一个本地管理方式下的表空间USERTBS2,每个分区大小为512K
create tablespace usertbs2 datafile 'D:\app\Snakewood\oradata\mydba\usertbs2.dbf' size 20m extent management local uniform size 512k;
- 修改USERTBS1表空间大小,将该表空间的数据文件改为自动扩展方式,最大值100M
alter database datafile 'D:\app\Snakewood\oradata\mydba\usertbs1.dbf' autoextend on next 5m maxsize 100m;
- 为USERTBS2表空间添加一个数据文件,大小20M
alter tablespace usertbs2 add datafile 'D:\app\Snakewood\oradata\mydba\usertbs2_1.dbf' size 20m;
- 创建一个临时表空间TEMPTBS1,并设置为数据库的默认临时表空间
create temporary tablespace temptbs1 tempfile 'D:\app\Snakewood\oradata\mydba\ temptbs1_1.dbf' size 20m extent management local uniform size 16m;
alter database default temporary tablespace temptbs1;
- 使用SQL命令对USERTBS1表空间进行联机和脱机状态转换
Alter tablespace USERTBS1 offline;
Alter tablespace USERTBS1 online;
- 创建一个SC表(SNO,CNO,GRADE),增加tablespace users字句,然后将USERS表空间设置为只读,尝试为SC表增加一条记录
create table SC (
SNO varchar2(20) primary key,
CNO varchar2(20) not null,
GRADE number(3) not null
)
tablespace users;
alter tablespace users read only;
insert into SC values (‘B201801’,’C0101’,98);
- 创建一个回滚表空间UNDOTBS2,并作为数据库的撤销表空间
create undo tablespace UNDOTBS2 datafile ‘D:\app\Snakewood\oradata\mydba\ UNDOTBS2_1.DBF’ size 20m;
- 将USERTBS1表空间重命名为USERTBS01
alter tablespace USERTBS1 rename to USERTBS01;
- 删除表空间USERTBS2,同时删除该表空间的内容和数据文件
drop tablespace USERTBS2 including contents and datafiles;
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