select * from sys.props$ where name IN ('NLS_CHARACTERSET', 'NLS_NCHAR_CHARACTERSET', 'NLS_LANGUAGE'); NAME VALUE$ COMMENT$ NLS_NCHAR_CHARACTERSET AL16UTF16 NCHAR Character set NLS_LANGUAGE AMERICAN Language NLS_CHARACTERSET KO16KSC5601 Character set UTF8: 공통 size*3byte AL16UTF16: 공통 size*2byte KO16KSC5601: 한글 size*2byte, 영문 size*1byte VARCHAR2 vs NVARCHAR2 : VARCHAR2는 LENGTH 계산시 byte 수로 계산, NVA..