got it. But I have another question. How about in the following case.

Column 1 Column 2 Column 3
02-20-02 1000 1
02-20-02 1000 1
02-20-02 1000 1
02-21-02 2000 2
02-21-02 2000 2
02-22-02 3000 3
02-22-02 3000 3
02-23-02 4000 4


how about this?...