Flagging a the first time of a series based on another column

[wcloninger]

I want to flag the first occurence rows with a "1" of each incident number. I've seen a lot online, but I haven't seen anything based on another column.

[v-yangliu-msft · Accepted solution]

Hi  @wcloninger ,

If you run into a situation where the dates are all the same and it's hard to distinguish the first row, you can create an Index in the power query.

Here are the steps you can follow：

1. In Power Query -- add Column – Index Column – From 1.

2. Create calculated column.

Test =
var _rank=
RANKX(
    FILTER(ALL('Table'),'Table'[records.Incident Number]=EARLIER('Table'[records.Incident Number])),
    [Index],,ASC)
return
IF(
    _rank=1,_rank,BLANK())

3. Result:

Best Regards,

Liu Yang

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

[amitchandak]

@wcloninger , A new column

if ([Record Creation date] = minx(filter(Table, [incident number] = earlier([incident number]) ), [Record Creation date]), 1, blank())

Power BI DAX- Earlier, I should have known Earlier: https://youtu.be/CVW6YwvHHi8