问题
How to do numbering/sequencing for sets of same column values? For example:
Col1 Col2
Andy 1
Chad 1
Bill 1
Andy 2
Bill 2
Bill 3
Chad 2
Bill 4
Since Andy got 2 values, I want to number it 1 and 2 in Column 2. For Bill, I want to number it 1, 2, 3 and 4 and so on.
回答1:
You can accomplish this with countif and a sliding range :
A B
1 val1 =COUNTIF($A$1:A1, A1)
2 valx =COUNTIF($A$1:A2, A2)
and so on.
The formula in column B can be dragged down / autofilled in the column. It anchors to the start of the range and only looks as far down as the value we are numbering; COUNTIF is tallying up the matching values in the preceding set this way.
回答2:
That is kind of slow when your list is really long. I've found sorting the column A to Z or small to larger and then using this formula is much faster:
=IF(A2=A1, A1+1,1)
Basically
if the value above is the same then add one to the count else start over at 1
来源：https://stackoverflow.com/questions/20570717/numbering-sequencing-sets-of-same-column-values