I want to give same number to the duplicate data in excel

Sort your column A then insert the number 1 in cell B2 and the following function in cell B3 and copy down.

function in cell B3 : =if(A3=A2, B2, B2+1)

Update

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answered Apr 28, 2015 at 8:29 dimitris_ps dimitris_ps 5,921 3 3 gold badges 32 32 silver badges 56 56 bronze badges Not Working please try in excel – user4542333 Commented Apr 28, 2015 at 8:37

It is also possible to do it in a dynamic way that does not require sorting.

Paste the following formula in B2 and copy down the column:

=IFERROR(INDEX(B$1:B1,MATCH(A2,A$1:A1,0)),MAX(B$1:B1)+1) 
answered Nov 9, 2021 at 13:49 1 1 1 bronze badge

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