UTF-8 설정

SELECT * FROM sys.props$ where name='NLS_CHARACTERSET';

update sys.props$ set value$='UTF8' where name='NLS_CHARACTERSET';
update sys.props$ set value$='UTF8' where name='NLS_NCHAR_CHARACTERSET';
update sys.props$ set value$='KOREAN_KOREA.UTF8' where name='NLS_LANGUAGE';