CREATE DIRECTORY EXPORT_DIR AS C:\path\to\export_dir;  
GRANT WRITE ON DIRECTORY SYS.EXPORT_DIR TO your_user;  


BEGIN  
    ORA_EXCEL.new_document;  
      
    ORA_EXCEL.add_sheet('Employees');  
    ORA_EXCEL.query_to_sheet('select * from employees');
	
	ORA_EXCEL.save_to_file('EXPORT_DIR', 'example.xlsx');  
END;