Excel sheets from sharepoint

Hello vpanchu 

i know that if you are reading from so many files and then want to add columns in your productive systems, this will be really ugly, because however to update your preview PQ has to start getting the data again. To it would make sense so reduce the amount of data when your are developing by using two different parameters so you can work on a small amount of data and when it's finished you can use all your data. This is how I did always when working with a lot of files

BR

Jimmy