One of thing that i still struggle with qv is historic data reload.
If i am reloading data on daily or weekly basis, lets say the source is excel spreadsheet Does this mean that i have to continue to keep the data history in excel file to be reflected into dashboard.
Is it possible to say do a reload on monthly data but ignore the prior months, leave it the way it was loaded before just add new month.
Keep history data in the QVD try to make QVD of history data from excel and if requires in data use this history QVD. and use current month QVD for the presentation.