If you want to use it for other workflow means ,store your variable in the arguments and passed it to other workflow.
Meanwhile ,keep the orginal datatable and dont do any modification in that (because you want that values).
so,copy the datatable into another datatable and use it.
Thank you very much for your reply.
It is working in that way.
but, its opening the excel file and saving data in dataTable everytime when i run it.
i would also like to know if there is a way to create a fixed database like an array.