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expdp -help
PARALLEL 是並行數，expdp和impdp都可以使用這個參數
--expdp導出：
1.創建數據泵路徑：
SQL> create or replace directory imostdb as '/opt/oracle/imost';
---Directory created. //需確保/home/目錄空間足夠大（提前進行備份驗證）
2.賦予導出用戶“導入導出”的權限
grant connect to imostdb_cs;
grant dba to imostdb_cs;
grant exp_full_database to imostdb_cs;
grant imp_full_database to imostdb_cs;
grant resource to imostdb_cs;
3.導出數據：（dmp文件在數據泵路徑下）
expdp userid=imostdb_cs/'%TGB6yhn' directory=imostdb dumpfile=Expdp_imost_20150318.dmp LOGFILE=Expdp_imost_20150318.log SCHEMAS=PROMOTION CONTENT=METADATA_ONLY;
--需要注意的地方有：
1.userid用到的用戶和密碼是否正確並具有導出導入權限
2.directory用到的路徑是否存在並保證空間充裕且userid用到的用戶對該路徑擁有讀寫權限
3.用戶模式導出使用SCHEMAS，除此之外還有表模式，表空間模式，全庫模式等（網上可以找到很多模板的）
4.CONTENT參數值，因爲本次僅導出數據結構所以我們使用的是METADATA_ONLY，該參數的默認值就是ALL
--impdp導入
第一步到第三步請使用具有dba權限的用戶執行
第一步：創建用戶所在的profile
-- Create profile
create profile SDPUSER limit
sessions_per_user unlimited
cpu_per_session unlimited
cpu_per_call unlimited
connect_time unlimited
idle_time unlimited
logical_reads_per_session unlimited
logical_reads_per_call unlimited
composite_limit unlimited
private_sga unlimited
failed_login_attempts unlimited
password_life_time unlimited
password_reuse_time unlimited
password_reuse_max unlimited
password_lock_time unlimited
password_grace_time unlimited
password_verify_function Null;
第二步：創建用戶並賦權
-- Create the user
create user PROMOTION identified by "ChPromo123"
default tablespace promotion
temporary tablespace TEMP
profile SDPUSER;
-- Grant/Revoke role privileges
grant connect to PROMOTION;
grant dba to PROMOTION;
grant exp_full_database to PROMOTION;
grant imp_full_database to PROMOTION;
grant resource to PROMOTION;
-- Grant/Revoke system privileges
grant alter any trigger to PROMOTION;
grant alter any type to PROMOTION;
grant create any directory to PROMOTION;
grant create any table to PROMOTION;
grant create any trigger to PROMOTION;
grant create any type to PROMOTION;
grant create any view to PROMOTION;
grant create job to PROMOTION;
grant create procedure to PROMOTION;
grant create sequence to PROMOTION;
grant create session to PROMOTION;
grant drop any table to PROMOTION;
grant drop any trigger to PROMOTION;
grant drop any type to PROMOTION;
grant drop any view to PROMOTION;
grant insert any table to PROMOTION;
grant unlimited tablespace to PROMOTION;
第三步：創建導入導出路徑並賦權
create or replace directory LOCAL_TRANSFER as '/opt/oracle/backup';
grant read,write on directory LOCAL_TRANSFER to promotion;
第四步：在後臺使用oracle用戶執行如下導入語句
（請注意確認用戶，表空間以及dmp文件信息）
impdp userid=promotion/'userpasswd' directory=LOCAL_TRANSFER dumpfile=Expdp_promotion_20150317.dmp LOGFILE=Impdp_promotion_20150317.log remap_tablespace=TS_PMT_DATA:PROMOTION,TS_SDP_TEMP:TEMP,TS_PMT_IDX:PROMOTION_INDEX SCHEMAS=PROMOTION
--注：需要注意的地方
1.導入的用戶最還與原來保持一致，用戶權限要賦足
2.以上都需執行，且dmp文件要放在創建的數據泵路徑下
3.如果上面impdp導入出問題，執行“impdp userid=promotion/'userpasswd' directory=LOCAL_TRANSFER dumpfile=Expdp_promotion_20150317.dmp”