32-bit to 64-bit Application Migration
Use Oracle 64-bit components to create your applications.
To migrate your business logic, refer to Migration Tips on the Microsoft Developer Network (MSDN) website at http://msdn.microsoft.com/en-us/library/windows/desktop/aa384214.aspx.
Note:
NCHAR columns in user tables are not changed during the migration.
See Also:
"Converting 32-bit Oracle Database to 64-bit Oracle Database" and “Post-Upgrade Tasks for Oracle Database” in Oracle Database Upgrade GuideParent topic: Developing Applications for Windows