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  • Orcale修改数据库字符集

    https://www.cnblogs.com/rusking/p/4531444.html

    参考这篇文档。

    首先一定要用sysdba登陆,一个赋予sysdba权限的账号是不行的。

    然后一定要用SQL PLUS操作

    conn / as sysdba

    SHUTDOWN IMMEDIATE; 
    STARTUP MOUNT EXCLUSIVE; 
    ALTER SYSTEM ENABLE RESTRICTED SESSION;
    ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
    ALTER SYSTEM SET AQ_TM_PROCESSES=0;
    ALTER DATABASE OPEN;
    ALTER DATABASE NATIONAL CHARACTER SET AL16UTF16; 更改国际字符集
    ALTER DATABASE CHARACTER SET ZHS16GBK; 更改本地字符集
    SHUTDOWN IMMEDIATE;
    STARTUP ;
     
    2.如果错误信息,请对照一下信息
    如果提示:
        ORA-12717: Cannot issue ALTER DATABASE NATIONAL CHARACTER SET when NCLOB, NCHAR
    or NVARCHAR2 data exists
    则更改使用以下语句:
        ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE AL16UTF16;
     
    如果提示:
        ORA-12712: new character set must be a superset of old character set
    则更改使用以下语句:
        ALTER DATABASE character set INTERNAL_USE ZHS16GBK;
    如果提示:
        ORA-01109: database not open
    则更改使用以下语句:
        ALTER DATABASE OPEN;
     
    如果提示:
        ORA-12719: operation requires database is in RESTRICTED mode
    则更改使用以下语句:
        ALTER SYSTEM ENABLE RESTRICTED SESSION;
     
    如果提示:
        ORA-12721: operation cannot execute when other sessions are active
    则更改使用以下语句:
        SHUTDOWN IMMEDIATE; 
        STARTUP MOUNT EXCLUSIVE;
    如果还是提示同样的错误,则:

    select sid,serial#,username,machine from v$session;查看有哪些SESSION,然后

    alter system kill session 'sid'serial#' immediate;

    alter system kill session '158,7' immediate;

     
     
     
    验证修改是否成功
    select value$ from sys.props$ where name='nls_characterset'
    修改成功后,取消受限模式
    alter system disable restricted session;
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  • 原文地址:https://www.cnblogs.com/jade0702/p/13297212.html
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