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分类: LINUX

2013-09-10 23:22:32


  1.    SQL> conn /as sysdba
  2.     Connected.
  3.     SQL> shutdown immediate;
  4.     Database closed.
  5.     Database dismounted.
  6.     ORACLE instance shut down.
  7.     SQL> startup mount
  8.     ORACLE instance started.
  9.       
  10.     Total System Global Area 236000356 bytes
  11.     Fixed Size 451684 bytes
  12.     Variable Size 201326592 bytes
  13.     Database Buffers 33554432 bytes
  14.     Redo Buffers 667648 bytes
  15.     Database mounted.
  16.     SQL> ALTER SESSION SET SQL_TRACE=TRUE;//语句跟踪
  17.     System altered.
  18.     SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;
  19.       
  20.     System altered.
  21.       
  22.     SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
  23.       
  24.     System altered.
  25.       
  26.     SQL> ALTER SYSTEM SET AQ_TM_PROCESSES=0;
  27.       
  28.     System altered.
  29.       
  30.     SQL> alter database open;
  31.        
  32.     Database altered.
  33.       
  34.     SQL> ALTER DATABASE CHARACTER SET ZHS16GBK;
  35.     ALTER DATABASE CHARACTER SET ZHS16GBK
  36.     *
  37.     ERROR at line 1:
  38.     ORA-12712: new character set must be a superset of old character set
  39.       
  40.       
  41.     提示我们的字符集:新字符集必须为旧字符集的超集,这时我们可以跳过超集的检查做更改:
  42.       
  43.     SQL> ALTER DATABASE character set INTERNAL_USE ZHS16GBK;
  44.       
  45.     Database altered.
  46.       
  47.     SQL> select * from v$nls_parameters;
  48.       
  49.     PARAMETER VALUE
  50.     ---------------------------------------------------------------- ---------------
  51.     NLS_LANGUAGE AMERICAN
  52.     NLS_TERRITORY AMERICA
  53.     NLS_CURRENCY $
  54.     NLS_ISO_CURRENCY AMERICA
  55.     NLS_NUMERIC_CHARACTERS .,
  56.     NLS_CALENDAR GREGORIAN
  57.     NLS_DATE_FORMAT DD-MON-RR
  58.     NLS_DATE_LANGUAGE AMERICAN
  59.     NLS_CHARACTERSET ZHS16GBK
  60.     NLS_SORT BINARY
  61.     NLS_TIME_FORMAT HH.MI.SSXFF AM
  62.       
  63.     PARAMETER VALUE
  64.     ---------------------------------------------------------------- ---------------
  65.     NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI
  66.     NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM
  67.     NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI
  68.     NLS_DUAL_CURRENCY $
  69.     NLS_NCHAR_CHARACTERSET UTF8
  70.     NLS_COMP BINARY
  71.     NLS_LENGTH_SEMANTICS BYTE
  72.     NLS_NCHAR_CONV_EXCP FALSE
  73.       
  74.     19 rows selected.
  75.       
  76.       
  77.     重启检查是否更改完成:
  78.       
  79.     SQL> shutdown immediate;
  80.     Database closed.
  81.     Database dismounted.
  82.     ORACLE instance shut down.
  83.     SQL> startup
  84.     ORACLE instance started.
  85.       
  86.     Total System Global Area 236000356 bytes
  87.     Fixed Size 451684 bytes
  88.     Variable Size 201326592 bytes
  89.     Database Buffers 33554432 bytes
  90.     Redo Buffers 667648 bytes
  91.     Database mounted.
  92.     Database opened.
  93.     SQL> select * from v$nls_parameters;
  94.       
  95.     PARAMETER VALUE
  96.     ---------------------------------------------------------------- ---------------
  97.     NLS_LANGUAGE AMERICAN
  98.     NLS_TERRITORY AMERICA
  99.     NLS_CURRENCY $
  100.     NLS_ISO_CURRENCY AMERICA
  101.     NLS_NUMERIC_CHARACTERS .,
  102.     NLS_CALENDAR GREGORIAN
  103.     NLS_DATE_FORMAT DD-MON-RR
  104.     NLS_DATE_LANGUAGE AMERICAN
  105.     NLS_CHARACTERSET ZHS16GBK
  106.     NLS_SORT BINARY
  107.     NLS_TIME_FORMAT HH.MI.SSXFF AM
  108.       
  109.     PARAMETER VALUE
  110.     ---------------------------------------------------------------- ---------------
  111.     NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI
  112.     NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM
  113.     NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI
  114.     NLS_DUAL_CURRENCY $
  115.     NLS_NCHAR_CHARACTERSET UTF8
  116.     NLS_COMP BINARY
  117.     NLS_LENGTH_SEMANTICS BYTE
  118.     NLS_NCHAR_CONV_EXCP FALSE
  119.       
  120.     19 rows selected.
另外,网上的很多文章都有个注意:
引用

在Oracle9i中,如果数据库存在CLOB类型字段,那么就不允许对字符集进行转换

对于不同情况,Oracle提供不同的解决方案,如果是用户数据表,一般我们可以把包含CLOB字段的表导出,然后drop掉相关对象,
转换后再导入数据库;对于系统表,可以按照以下方式处理:
Java代码  收藏代码
  1. SQL> truncate table Metastylesheet;  
  2.   
  3.  Table truncated.


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