oracle 字符集

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---NLS_CHARACTERSET  字符集
select * from nls_database_parameters;

PARAMETER                      VALUE
------------------------------ ------------------------------
NLS_RDBMS_VERSION              19.0.0.0.0
NLS_NCHAR_CONV_EXCP            FALSE
NLS_LENGTH_SEMANTICS           BYTE
NLS_COMP                       BINARY
NLS_DUAL_CURRENCY              $
NLS_TIMESTAMP_TZ_FORMAT        DD-MON-RR HH.MI.SSXFF AM TZR
NLS_TIME_TZ_FORMAT             HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_FORMAT           DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_FORMAT                HH.MI.SSXFF AM
NLS_SORT                       BINARY
NLS_DATE_LANGUAGE              AMERICAN
NLS_DATE_FORMAT                DD-MON-RR
NLS_CALENDAR                   GREGORIAN
NLS_NUMERIC_CHARACTERS         .,
NLS_NCHAR_CHARACTERSET         AL16UTF16
NLS_CHARACTERSET               AL32UTF8       
NLS_ISO_CURRENCY               AMERICA
NLS_CURRENCY                   $
NLS_TERRITORY                  AMERICA
NLS_LANGUAGE                   AMERICAN

NLS_NCHAR_CHARACTERSET? 国家字符集

NLS_CHARACTERSET? 字符集

-----字符集和国家字符集的区别

字符集用来存储CHAR,VARCHAR2,CLOB,LONG等类型数据。

国家字符集用以存储NCHAR,NVARCHAR2,NCLOB等类型数据。