表空间相关：
http://blog.itpub.net/31535677/viewspace-2154486/
创建表空间并指定数据文件
create tablespace ecologytest datafile "D:apporacleoradataecology est.dbf"
size 5M autoextend on maxsize 4G
2、为表空间增加数据文件
alter tablespace ecologytest add datafile "D:apporacleoradataecology est1.dbf"
size 5M autoextend on maxsize 4G
3、修改表空间数据文件默认大小
alter database datafile "D:apporacleoradataecology est1.dbf" resize 10M
4、创建用户并指定默认表空间
create user ecologytest identified by nskfoa default tablespace ecologytest;
5、删除表空间
DROP tablespace ecologytest including contents and datafiles cascade constraints;
数据迁移相关（备份与恢复）
1、创建备份用户
create user baker identified by baker default tablespace baker;
2、创建备份目录
create or replace directory expdp_dir as "D:ak"
3、备份用户授权
grant read,write on directory expdp_dir to baker
4、导出备份数据
expdp baker/baker directory expdp_dir dumpfile=test.dump logfile=test.log
5、创建导入数据目录
create or replace directory impdp_dir as "D:ak"
6、授权导入用户
grant read,write on directory impdp_dir to baker
7、导入数据
impdp baker/baker directory expdp_dir dumpfile=test.dump logfile=test.log
