Solved Excel column comparison

November 8, 2011 at 15:01:36
Specs: Macintosh
I have a list of companies--about 160,000 a quarter for three years--that I want to compare.

Basically, I am trying to figure out who is on the list in 2009 that is not on the list in 2011 and vice versus.

Is there a formula to compare columns and spit out the names of who isn't on the second column?


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November 8, 2011 at 15:49:06
✔ Best Answer
If you don't have to do this very often, this brute force method should work:

Let's assume your lists are in Column A and B, starting in Row 1.

In C1 enter this:

=IF(ISNA(MATCH(A1,B:B,0)), "Not Found", A1)

Drag it down to the bottom of your list.

If the name in Column A exists in Column B, then the name from A will show in Column C. If not, you'll get "Not Found".

You can then do a Copy...Paste Special...Values on Column C to eliminate the formulas and then Filter the list to show the unique company names.

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