In the migration to Unicode, one of the most critical issues for database support is maintaining compatibility with the existing data which is commonly used on application systems. The normal approach currently deployed is to use UTF8 as Unicode encoding in these systems. As the encoding schema for UTF8 is nearly same as those for other multibyte character sets, it is easy to support Unicode by UTF8 without any major change for database and its application systems. But UTF8 is ASCII based encoding and cannot be applied to EBCDIC based systems. To make EBCDIC based application systems easy to migrate to Unicode, an EBCDIC based multibyte encoding schema is needed. This paper presents a EBCDIC based Unicode transformation encoding proposed by IBM and describe how this encoding will be incorporated into Oracle's globalization support. In the end, it will raise the proposal to have a standard EBCDIC based Unicode transformation encoding.