Oracle NLS_CHARACTERSET
SELECT * FROM nls_database_parameters WHERE PARAMETER = 'NLS_CHARACTERSET'; SELECT * FROM v$nls_parameters WHERE PARAMETER = 'NLS_CHARACTERSET'; -- NLS_CHARACTERSET for VARCHAR2, NLS_NCHAR_CHARACTERSET for NVARCHAR2 SELECT * FROM database_properties WHERE PROPERTY_NAME IN ('NLS_CHARACTERSET', 'NLS_NCHAR_CHARACTERSET');