AIX下使用NVARCHAR2发现乱码

生产环境导出的库导入至测试环境之后，有一个业务表发生了问题，所有字符型数据成了乱码，导致业务无法进行，经查询发生问题的业务表使用了NVARCHAR2字段类型，数据导出、字段类型修改为VARCHAR2之后，再导入，问题解决，后来查看了两台机器的字符集，发现确实是字符集设置的问题。

DB1
SQL> select * from v$nls_parameters;

PARAMETER                                                        VALUE
---------------------------------------------------------------- ----------------------------------------------------------------
NLS_LANGUAGE                                                     SIMPLIFIED CHINESE
NLS_TERRITORY                                                    CHINA
NLS_CURRENCY                                                     RMB
NLS_ISO_CURRENCY                                                 CHINA
NLS_NUMERIC_CHARACTERS                                           .,
NLS_CALENDAR                                                     GREGORIAN
NLS_DATE_FORMAT                                                  DD-MON-RR
NLS_DATE_LANGUAGE                                                SIMPLIFIED CHINESE
NLS_CHARACTERSET                                                 ZHS16GBK
NLS_SORT                                                         BINARY
NLS_TIME_FORMAT                                                  HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT                                             DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT                                               HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT                                          DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY                                                RMB
NLS_NCHAR_CHARACTERSET                                           UTF8
NLS_COMP                                                         BINARY
NLS_LENGTH_SEMANTICS                                             BYTE
NLS_NCHAR_CONV_EXCP                                              FALSE

19 rows selected

SQL>

DB2
SQL> select * from v$nls_parameters;

PARAMETER                                                        VALUE
---------------------------------------------------------------- ----------------------------------------------------------------
NLS_LANGUAGE                                                     SIMPLIFIED CHINESE
NLS_TERRITORY                                                    CHINA
NLS_CURRENCY                                                     RMB
NLS_ISO_CURRENCY                                                 CHINA
NLS_NUMERIC_CHARACTERS                                           .,
NLS_CALENDAR                                                     GREGORIAN
NLS_DATE_FORMAT                                                  DD-MON-RR
NLS_DATE_LANGUAGE                                                SIMPLIFIED CHINESE
NLS_CHARACTERSET                                                 ZHS16GBK
NLS_SORT                                                         BINARY
NLS_TIME_FORMAT                                                  HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT                                             DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT                                               HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT                                          DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY                                                RMB
NLS_NCHAR_CHARACTERSET                                           AL16UTF16
NLS_COMP                                                         BINARY
NLS_LENGTH_SEMANTICS                                             BYTE
NLS_NCHAR_CONV_EXCP                                              FALSE

19 rows selected

SQL>

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