07-20-2018 03:16 PM
How do I use only the most recent data point?
I have a data source which displays a history of 'events' from an application's diagnostics. This application runs on dozens of different machines, and so there are many data points. I don't care about the history, however, only the most recent data point for each machine. I've done some massaging with my queries, and now my data table only displays the most recent row for each machine. Great - this is exactly what I want.
However, for nearly all the visuals I've tried to use, I'm forced to choose between different aggregates for the value that I want to use. These agregates consider the other rows that are in the original data source even though these other rows and values aren't included in my query and aren't visible in the Data view. I don't understand how to make Power BI truly ignore the rows that I don't care about.
07-20-2018 06:27 PM - edited 07-20-2018 06:33 PM
If the results are not in the query or data view that there is no way I know of that PowerBI is including them. Can you please provide more details about your data set, model and forumla. I would guess your measure or filter context are resulting in values different than you expect but we will need more information in order to help you.
Measures that you write or are implied in the visuals by dragging column names into the visual fields require aggregate values. If you want to use distinct value calculations you could try Calculated columns. to get single value results in a measure, the trick is to use is to use CALCULATE with FILTERs in order to restrict the results to just a single value that you care about so MAX/MIN/AVG are all the same and it does not really matter which you use. In your table you may be implying a more granular filter context than in your visuals so its working there.
07-23-2018 01:24 AM
"These agregates consider the other rows that are in the original data source even though these other rows and values aren't included in my query and aren't visible in the Data view."
<--- Which aggregation are you using and could you share some dummy data with your measure to clarify more explicitly about your issue?