SQL> select * from nls_database_parameters; PARAMETER VALUE ------------------------------------------------ ---------------------------- NLS_LANGUAGE AMERICAN NLS_TERRITORY AMERICA NLS_CURRENCY $ NLS_ISO_CURRENCY AMERICA NLS_NUMERIC_CHARACTERS ., NLS_CHARACTERSET AL32UTF8 NLS_CALENDAR GREGORIAN NLS_DATE_FORMAT DD-MON-RR NLS_DATE_LANGUAGE AMERICAN 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 $ NLS_COMP BINARY NLS_LENGTH_SEMANTICS BYTE NLS_NCHAR_CONV_EXCP FALSE NLS_NCHAR_CHARACTERSET AL16UTF16 NLS_RDBMS_VERSION 10.2.0.4.0
主要需要关心的就是 NLS_NCHAR_CHARACTERSET 和 NLS_CHARACTERSET。
NLS_CHARACTERSET 是 CHAR, VARCHAR2, CLOB 等列的编码。
NLS_NCHAR_CHARACTERSET 是NCHAR, NVARCHAR2, NCLOB等列的编码。