I want to calculate the time difference (datediff) in days between two dates: Timestamp and Date (blue). But I want to calculate this difference for the first date of date, for every IDs. If it is not the first date, it should return an empty value.
Thanks in advance
@Ley022 , Logic is not very clear.
You can try like
new column =var _min = minx(filter(table,[Id] =earlier([ID])),[Date])return if([Date]=_min , datediff([date], [timestamp], day), blank())
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