DDL及其数据泵导入导出（impdp/expdp）

create tablespace ybp_dev datafile ‘G:\app\Administrator\oradata\health\ybp_dev1.dbf‘ size 10m autoextend on;

create user 用户名 default tablespace 表空间名 identified by 用户密码;

grant connect,resource to 用户;

测试连接 conn mpi/1234

删除表空间
drop tablespace XX including contents and datafiles cascade constraints;
//including contents 删除表空间的内容
//cascade constraints同时删除
tablespace中表的外键参照

删除用户
drop user USERNAME CASCADE;
如提示ora-01940 无法删除已经连接会话的用户
select username,sid,serial# from v$session where username like ‘HIP4‘
找到要删除用户的sid,和serial，并删除
alter system kill session‘532,4562‘

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su - oracle   -切换oracle用户
sqlpus / as sysdba   -本地登录sqlplus
select * from dba_directories;  -查询路径
drop directory dp_dir;   -删除目录
create directory dp_dir as ‘/backup/dp_dir‘;  -创建目录
grant read,write on directory dp_dir to public;  -赋权目录
expdp xx/xx directory=dp_dir dumpfile=xxx.dmp schemas=xxx  --导出

例  expdp ‘"/as sysdba"‘ directory=dp_dir dumpfile=xx1207.dmp schemas=xx
impdp ‘"/as sysdba"‘ directory=dp_dir dumpfile=1112mdbyl.dmp   --导入.注意此处不加封 封号！！！！

impdp ‘"/as sysdba"‘ directory=dp_dir dumpfile=1112mdbyl.dmp remap_schema=mdbyl:mdbyl3   --导入改名

select file_name,tablespace_name from dba_data_files; --查询数据文件路径

select username,default_tablespace from dba_users where username like ‘X%‘;  --模糊查询x开头的用户

SELECT * FROM V$SESSION WHERE USERNAME=‘PINGTAI‘;

alter system kill session ‘3406,1671‘;
drop user PINGTAI cascade;
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SELECT t.table_name,
       t.colUMN_NAME,
       t.DATA_TYPE || ‘(‘ || t.DATA_LENGTH || ‘)‘,
       t1.COMMENTS
  FROM User_Tab_Cols t, User_Col_Comments t1
WHERE t.table_name = t1.table_name
    AND t.column_name = t1.column_name(+);