Forum Discussion
Helper IIIM Formula - Retrieve the max number for a repeating row
Hello,
I have a database with multiple rows where each one has a person and some of their info, including an ID.
People can show up in more than one row, and their ID can be different.
I want to be able to show in a new column the max ID number for each person. All of this in Power Query (M).
Can someone help? I have provided a simple database below.
Thanks,
You can select the rows with the same name and then get the max ID like this:
List.Max(Table.SelectRows(#"Changed Type", (r) => r[name] = [name] )[ID])#"Changed Type" is the previous step
3 Replies
- HotChilli
Community Champion
You can select the rows with the same name and then get the max ID like this:
List.Max(Table.SelectRows(#"Changed Type", (r) => r[name] = [name] )[ID])#"Changed Type" is the previous step
- HotChilli
Will depend on the size of the data I suppose. You could check to see if query folding is taking place.
Also you could also investigate the buffer functions to see if PQ can read files once instead of multiple times.
