创建表空间：
create [undo|TEMPORARY]tablespace venn datafile '/opt/oracle/db01/app/oracle/oradata/OSSORCL/venn01.dbf'
size 10M
autoextend on next 100M
maxsize 500M [unlimited] --最大32G
logging online permanent; --一直在线
注：
1 、undo : 创建undo表空间
2、 temporary ： 创建临时表空间
添加数据文件：
alter tablespace venn add datafile '/opt/oracle/db01/app/oracle/oradata/OSSORCL/venn02.dbf'
size 10M
autoextend on next 100M
maxsize 500M ;
同时添加多个文件：
alter tablespace venn add datafile '/opt/oracle/db01/app/oracle/oradata/OSSORCL/venn02.dbf'
size 10M
autoextend on next 100M
maxsize 500M,
'/opt/oracle/db01/app/oracle/oradata/OSSORCL/venn02.dbf'
size 10M
autoextend on next 100M
maxsize 500M ;
删除表空间：
drop tablespace venn including contents and datafiles;
同时删除内容和数据库文件。