Hello,
When i try to export the data from table into excel document(xlsx format), i could't. But, xls format works fine. And also,
when i open xlsx format file:

when i open xls format file. But,able to access the file

Tool: PL/SQL developer
DB: Oracel 11G
Format: Required the data in excel format(xlsx/xls), not in CSV format.
Support me here.