Win said:
.. i have two data columns
how can i get the common result ?
One way ..
Assuming data is in cols A & B, from row2 down
Put in C2: =IF(A2="","",ISNUMBER(MATCH(A2,B:B,0)))
Copy down till last row of data in col A
(Above compares col A against col B)
Put in D2: =IF(B2="","",ISNUMBER(MATCH(B2,A:A,0)))
Copy down till last row of data in col B
(Above compares col B against col A)
Put 2 labels into C1

1, and do an autofilter on cols C & D in turn
Filtering out: TRUE in each case (col C, then col D) would then
locate the matches (common items), viz.:
filtering TRUE in col C reveals items in col A found within col B
filtering TRUE in col D reveals items in col B found within col A