I need to export from QVD to excel, But this has to happen automatically(Not by clicking export to excel option, No manual interference) and It has to done by scripting only, How?
After that the major task is, After the data got exported to excel (for example after two or three days if some data is getting updated in QV that should automatically get updated to excel also), Can the data in excel be updated ? If there is way please let me know.
In QlikView Script, there is a STORE statement that can export to csv. Excel will happily open a csv file.
An Excel file cannot be appended or updated. And in the end it wouldn't serve any purpose, because recreating a csv from the QVD is much easier and faster. You'll have to schedule a QV reload in Windows Task Scheduler if you only use QV desktop for this export. On a QlikView Server, you can schedule and manage a task.
I do not understand "...on priority can some" so I'll finish off with the QV credo: experiment and start with the simplest technique to see what works best for you.