it is not yet possible, to merge data based on a common field. Walready have this feature request in our issue tracking system. We do not know yet, in which release we are going to implement it.
In the meantime, you could try to accomplish this with a 3rd party add-in:
It should be possible, since we do not input any special objects for structures, we use only a simple function. We will later implement probably a similar functionality.