I would like to concatenate data from two cells into one cell. I would also like to only combine those cells that have the same ID.
Task ID Name
4355.2 Participant
4355.2 Leader
4462.1 Online
4462.1 Quick
4597.1 Slide
4597.1 One Page
4597.1 One Topic
For example, for this, I would like a cell for 4355.2 with "Participant, Leader" as the data in that cell. The same type of data for 4462.1 with "Online and Quick" as the data for that cell.
Task ID Name
4355.2 Participant, Leader
Is there a way to do that in Excel?
4462.1 Online, Quick
Assuming your data is in A1:B8, and sorted.
in C2, =IF(OR(A2>A1,A1="Task ID"),B2,C1&", "&B2), and copy this down to the end of the data
Copy column A to column D, and remove duplicates (tell excel not to expand the selection)
In E2, =INDEX(C:C,MATCH(D2,A:A),1) and copy this down to the end of the de-duplicated data in column D
来源：https://stackoverflow.com/questions/11195148/excel-concatenate