Hi There,
There's definitely a way to do it:
1. In query studio, go to 'Edit Data'.
2. Click the data item you wish to count (eg. customerID)
3. In the 'Edit Data' menu, click 'Summarize...'
4. In the 'Summarize' pane that appears on the bottom of the screen, on the top right there is an 'Advanced' hyperlink. Click it.
5. Choose 'Summary for Cells' = Count (or Count Distinct)
6. Choose an appropriate (or none) summary for footers
7. Click OK
Done!
Hope this helps.
J