Comparing Columns to Find Matches

[cultavix]

I have a very large excel document with about 780,000 rows and I would like to compare the data in one of its columns with the data I have an another spreadsheet´s column. (i can put that data in the same worksheet). I would like to see which one of those match...

here is example

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I have another columm with the same kind of data... I want to see if they match, and which one they are..

[NBVC]

A simple formula like this will tell you if a match has occurred and in what row it is...

=Match(A1,B:B,0)

So this will check if the item in A1 is found anywhere in column B. If yes, it will display the position (in this case, also the row number) that it is found in. If there is no match you will simply get a #N/A error.

P.S. your original title did not correspond to the question you have.. so I changed it.