Columns 1 and 3 are of concern, I first want to consolodate column 3,
and then sort again by column 1
BEFORE SORT:
col1 col2 col3 col4 col5
12 z d r 4
13 z c r 4
14 z d r 4
15 z c r 4
AFTER SORT:
col1 col2 col3 col4 col5
12 z d r 4
14 z d r 4
13 z c r 4
15 z c r 4