Hi everybody,

I've managed to get Views Group By working, using the tutorial at http://drupal.org/node/389230.
I'd like to expand the view used in the tutorial to count the use of child and parent terms combined and grouped by parent term.

Let me clarify with an example.
Let's say we have these terms in a certain Vocabulary:

Parent term 1
-- Child term A
-- Child term B
-- Child term C
Parent term 2
-- Child term D
-- Child term E
-- Child term F
Parent term 3

And let's say we have some nodes tagged like this:

- Example node #1 --> Child term A
- Example node #2 --> Child term A
- Example node #3 --> Child term D
- Example node #4 --> Parent term 2
- Example node #5 --> Child term F
- Example node #6 --> Parent term 3

I'd like the result to be a table with this layout:

Parent term       | # of nodes
---------------------------------
Parent term 1     |  2
Parent term 2     |  3
Parent term 3     |  1

If anybody can help me out, I'd be much obliged! Thanks a million in advance. :)