That method certainly was the case for Word 97.
However, I have found that in later versions of word, all tables seem to be
floating by default (converted to frames when converted back to Word 97),
which does not permit this join method. The only way I can achieve this is
to cut and paste rows. This seems to be a retrograde step.
How can tables be taken out of floating mode, and put back into the document
flow as in Word 97. Or is this a permanent change?
The filter for converting back to Word 97 is also quite poor when dealing
with tables. With tables that go over more than one page, these are put in a
single frame with content being hidden.