oracle11g expdp/impdp数据库

oracle11g导入/导出数据库
导出
    1、创建目录
        sqlplus / as sysdba
        create directory dbDir as ‘d:\oralce_sdic_backup\‘;
        grant read,write on directory dbDir to sdic;
    2、cmd导出
        expdp sdic/hymake528sdic schemas=sdic dumpfile=oralce_sdic_backup_%date:~0,4%%date:~5,2%%date:~8,2%.dmp logfile=oralce_sdic_backup_%date:~0,4%%date:~5,2%%date:~8,2%.log  directory=dbDir
导入
    1、删除原用户、表空间
        sqlplus / as sysdba;
        drop user sdic cascade;
        drop tablespace sdic_tablespace including contents and datafiles;
    2、创建用户、表空间
        sqlplus / as sysdba
        create tablespace sdic_tablespace datafile ‘E:/soft/oracle11g_data/sdic1.dbf‘ size 10g autoextend on next 5m;
        alter tablespace sdic_tablespace  add datafile  ‘E:/soft/oracle11g_data/sdic2.dbf‘ size 10g autoextend on next 5m;
        create user sdic identified by hymake528sdic;
        grant connect,resource,dba to sdic;
        alter user sdic default tablespace sdic_tablespace;
    3、创建目录
        create directory dbDir as ‘E:\soft\oracle11g_bak‘;
        grant read,write on directory dbDir to sdic;
    4、cmd导入　　　　　impdp sdic/hymake528sdic DIRECTORY=dbDir DUMPFILE=ORALCE_SDIC_BACKUP_20171207.DMP REMAP_SCHEMA=sdic:sdic REMAP_TABLESPACE=USERS:sdic_tablespace table_exists_action=append full=y logfile=imp20171207.log
   说明：1、导出的dumpfile=oralce_sdic_backup_%date:~0,4%%date:~5,2%%date:~8,2%.dmp logfile=oralce_sdic_backup_%date:~0,4%%date:~5,2%%date:~8,2%.log　  %date:~0,4%%date:~5,2%%date:~8,2%这里是取时间yyyyMMdd的方法。2、alter tablespace sdic_tablespace  add datafile  ‘E:/soft/oracle11g_data/sdic2.dbf‘ size 10g autoextend on next 5m;　　这是追加了一个数据库文件，当数据库大于32g的时候，一个数据库文件存放不下。3、删除用户失败处理

　　////如果出现 ORA-00604: 递归 SQL 级别 1 出现错误
　　////或出现ORA-01940：无法删除当前连接的用户
　　////就重启数据库再drop
　　////SQL> shutdown immediate
　　////SQL> startup