A client of ours would like to compare sales for a given periode with the same periode last year. Is this feature available in DW? If so, where can I find it?
In Ecommerce, you can find a statistics node. Look on orders - it can show a graph if you still have a flash supporting browser. Otherwise it can give you a table as well. You can run the report twice - one for each period and then compare.
We are looking into improvements of the ecommerce reporting.