SQL Developer:Problem with multi byte size after import using excel format

Hi,
Need your help. I am trying to export multibyte characters from our China instance(r11i instance) using SQL Developer's export data via Excel format into an R12 Vision instance. I have a staging table with exactly the same structure in both instances. Prior to export to excel, I check the byte size of the sample data below using LENGTH and LENGTHB sql functions and these are the results:
Sample data = 材料LI（USD）
LENGTH=9
LENGTHB=13
Then, I exported the table as excel file. Afterwards, I used SQL Developer to import the excel file into the table of the target instance. I check the bytesize again and here are the results:
Sample data = 材料LI（USD）
LENGTH=9
LENGTHB=17
The byte size increased from 13 to 17. I did not change anything on the excel file. Just straight forward export to excel file then imported it to the target instance. How come there is an increase in byte size? Has anyone encountered this in SQL Developer? We really need to export the files as excel.
Source:
Database version = 9.2.0.5.0
Target:
Database version = 11.1.0.7.0
Regards,
Wendell
Edited by: user13038177 on May 13, 2010 9:05 PM
Edited by: user13038177 on May 13, 2010 9:06 PM

Wendell,
This forum is for handling issues migrating from non-Oracle databases to Oracle databases.
As this is an Oracle to Oracle issue using SQL*Developer export it would be better to open a new thread in the SQL*Developer forum -
SQL Developer
There will be more people there who can help with this problem.
Regards,
Mike
Edited by: mkirtley on May 14, 2010 10:16 AM

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