12.2地区，国家设置错误，导致乱码

SQL> alter system set NLS_TERRITORY=‘AMERICA‘ scope=spfile sid=‘*‘;

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SQL> alter system set NLS_TERRITORY=^C

SQL> alter system set NLS_LANGUAGE=‘AMERICAN‘ scope=spfile sid=‘*‘;

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SQL> alter system set NLS_ISO_CURRENCY=‘AMERICA‘ scope=spfile sid=‘*‘;

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SQL> alter system set NLS_DATE_LANGUAGE=‘AMERICAN‘ scope=spfile sid=‘*‘;

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SQL>