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  • expdp/impdp数据泵方式备份还原数据库

    1、用sysdba账号登入数据库,然后查询到要更改的用户信息:
    
       SELECT user#,name FROM user$ where user#=110;
    
    2、更改用户名并提交:
    
    	 UPDATE USER$ SET NAME='C##DALIAN' WHERE user#=110;
         COMMIT;
    
    3、强制刷新:
    
         ALTER SYSTEM CHECKPOINT;
         ALTER SYSTEM FLUSH SHARED_POOL;
    
    4、更新用户的密码:
    
    	 ALTER USER c##yk_dalian_test IDENTIFIED BY Letmein_12#$;
    	 
    
    # 查询需要修改的用户
    SELECT user#,name FROM user$ where user#=110;
    
    # 创建备份路径,expdp/impdp必须要有这个地址
    create directory dumpdir as '/home/oracle'
    
    # 导出数据库
    expdp 'C##DALIAN/Letmein' directory=DUMPDIR schemas=C##DALIAN dumpfile=2021_shujuku.dmp logfile=shujuku.log
    
    # 删除表空间
    drop user c##yk_dalian_test cascade;
    
    # 创建表空间
    create tablespace c##yk_dalian_test datafile '/orc/app/oracle/oradata/orcl/c##yk_dalian_test.dbf' size 500M autoextend on next 5M maxsize unlimited;
    
    # 创建用户并指定表空间
    create user c##yk_dalian_test identified by Letmein_12#$ default tablespace c##yk_dalian_test temporary tablespace temp profile default;
    
    # 用户授权
    grant connect,resource,dba to c##yk_dalian_test;
    
    # 还原数据库。 remap_schema修改用户名, remap_tablespace修改表空间
    impdp c##yk_dalian_test/Letmein_12#$ DIRECTORY=DUMPDIR dumpfile=2021_shujuku.dmp remap_schema=C##DALIAN:c##yk_dalian_test remap_tablespace=C##DALIAN:c##yk_dalian_test
    
    # 查询指定用户表空间
    select default_tablespace from dba_users where username='c##yk_dalian_test';
    

      

    1、用sysdba账号登入数据库,然后查询到要更改的用户信息:

      SELECT user#,name FROM user$ where user#=110;

    2、更改用户名并提交:

    UPDATE USER$ SET NAME='C##DALIAN' WHERE user#=110;
    COMMIT;

    3、强制刷新:

    ALTER SYSTEM CHECKPOINT;
    ALTER SYSTEM FLUSH SHARED_POOL;

    4、更新用户的密码:

    ALTER USER c##yk_dalian_test IDENTIFIED BY Letmein_12#$;

    # 查询需要修改的用户
    SELECT user#,name FROM user$ where user#=110;

    # 创建备份路径,expdp/impdp必须要有这个地址
    create directory dumpdir as '/home/oracle'

    # 导出数据库
    expdp 'C##DALIAN/Letmein' directory=DUMPDIR schemas=C##DALIAN dumpfile=2021_shujuku.dmp logfile=shujuku.log

    # 删除表空间
    drop user c##yk_dalian_test cascade;

    # 创建表空间
    create tablespace c##yk_dalian_test datafile '/orc/app/oracle/oradata/orcl/c##yk_dalian_test.dbf' size 500M autoextend on next 5M maxsize unlimited;

    # 创建用户并指定表空间
    create user c##yk_dalian_test identified by Letmein_12#$ default tablespace c##yk_dalian_test temporary tablespace temp profile default;

    # 用户授权
    grant connect,resource,dba to c##yk_dalian_test;

    # 还原数据库。 remap_schema修改用户名, remap_tablespace修改表空间
    impdp c##yk_dalian_test/Letmein_12#$ DIRECTORY=DUMPDIR dumpfile=2021_shujuku.dmp remap_schema=C##DALIAN:c##yk_dalian_test remap_tablespace=C##DALIAN:c##yk_dalian_test

    # 查询指定用户表空间
    select default_tablespace from dba_users where username='c##yk_dalian_test';

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  • 原文地址:https://www.cnblogs.com/kjjmj/p/14766745.html
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