一  impdp 导入 

     --删除用户若用户已经存在（可以使用Oracle自带的sqlplus进行连接） 
SQL> drop user USER_NAME cascade 
SQL> / 
SQL> drop tablespace USER_TABLESPACE including contents and datafiles 
SQL> / 

     --创建表空间 下载
SQL> CREATE TABLESPACE USER_TABLESPACE DATAFILE 'USER_tablespace.DBF' SIZE 200M AUTOEXTEND ON NEXT 50M MAXSIZE UNLIMITED PERMANENT DEFAULT STORAGE(INITIAL 64K MINEXTENTS 1 MAXEXTENTS 2147483645) MINIMUM EXTENT 64K LOGGING ONLINE 
SQL> / 

     --创建用户 
SQL> CREATE USER USER_NAME IDENTIFIED BY user_password DEFAULT TABLESPACE USER_TABLESPACE TEMPORARY TABLESPACE TEMP PROFILE DEFAULT 
SQL> / 
     --创建用户目录 
SQL> CREATE DIRECTORY directory_name  as 'filePath'  
SQL> / 
      --示例 my_dir as 'D:/db_dir' 下载
     
     --为用户授权 
SQL> GRANT CONNECT TO USER_NAME WITH ADMIN OPTION 
SQL> / 
SQL> GRANT DBA TO USER_NAME WITH ADMIN OPTION 
SQL> / 
SQL> GRANT UNLIMITED TABLESPACE TO USER_NAME WITH ADMIN OPTION 
SQL> / 
SQL> GRANT read, write ON DIRECTORY directory_name TO USER_NAME 
SQL> / 

     --执行导入（退出sqlplus在CMD执行导入语句） 
impdp USER_NAME/user_password@SID_NAME directory=directory_name dumpfile=USER_NAME.DMP schemas=USER_NAME logfile=USER_NAME.log; 
pause; 

二 expdp 导出 下载

expdp USER_NAME/user_password@SID_NAME directory=directory_name dumpfile=USER_NAME.DMP schemas=USER_NAME logfile=USER_NAME.log; 
pause;