Copy first columns A1 to B3147 (or whatever amount of lines there is)
from Sheet 1 and paste them into Sheet 3!A1. The data will then lie in
the same block as in Sheet 1.

Then copy A1 to B8116 ( or whatever amount of lines there is in this
sheet) from Sheet 2 and paste them into Sheet 3 below the first ones.
In this example they will lie in the block from A3148 to B11263.

In C1 write =IF(A1=A2;A1;""). Perhaps you must use comma instead of
semicolon

Copy C1 all the way down and include also column D

Sort column A and B by A and you will see all the A duplicates in
column C

Sort column A and B by B and you will see all the B duplicates in
column D


Niels


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nsv
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