查看字符集

select * from v$nls_parameters;

PARAMETER                      VALUE
------------------------------ --------------------
NLS_LANGUAGE                   AMERICAN
NLS_TERRITORY                  AMERICA
NLS_CURRENCY                   $
NLS_ISO_CURRENCY               AMERICA
NLS_NUMERIC_CHARACTERS         .,
NLS_CALENDAR                   GREGORIAN
NLS_DATE_FORMAT                DD-MON-RR
NLS_DATE_LANGUAGE              AMERICAN
NLS_CHARACTERSET               ZHS16GBK
NLS_SORT                       BINARY
NLS_TIME_FORMAT                HH.MI.SSXFF AM

PARAMETER                      VALUE
------------------------------ --------------------
NLS_TIMESTAMP_FORMAT           DD-MON-RR HH.MI.SSXF
                               F AM

NLS_TIME_TZ_FORMAT             HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT        DD-MON-RR HH.MI.SSXF
                               F AM TZR

NLS_DUAL_CURRENCY              $
NLS_NCHAR_CHARACTERSET         AL16UTF16
NLS_COMP                       BINARY
NLS_LENGTH_SEMANTICS           BYTE

PARAMETER VALUE
------------------------------ --------------------
NLS_NCHAR_CONV_EXCP FALSE

查看字符集select * from v$nls_parameters;