Count occurances of equal values in two col. - array within SU
Once again, the only way I can see to do this is with a UDF I've
installed, morefunc.
{=COUNTA(A1:A1000)-COUNTDIFF(A1:A1000&B1:B1000,,)}
Array entered.
If the answer is greater than zero, you have a duplicate. If the
answer is less than zero, you probably forgot to enter as array.
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