Getting Previous Row using DAX measure

Hi,

Could you please check the attached file?

I tried to create measures again, and please check the last measure = [test measure total fix] if it shows a correct number for the Grand Total row.

Please be noted that the DAX formula might be slow. I will try to find a way to optimize the DAX formula, but please check whether the number on the grand total level for Test Measure Total Fix is correct.

Thanks.

Hi Jihwan_Kim 
Thanks for the Measure it is showing correct value... but yeah it is working slow, and in my original data there are millions of rows and there it is taking so much time to execute on the visual and after that showing error :

Can we optimize this measure or we should for look for another approach ?

Thanks and Regards
Mihir

Hi,

Please check the attached pbix file.

All measures are in the attached pbix file. It is still slow, but I it is faster than before.

Could you please check if it works for your datamodel?

Hi Jihwan_Kim 

Thanks for your measure Jihwan_Kim but there was a small issue with that measure. 

Instead I have created this new file with the help of some of your measures, these measures are working fine in my data model also(and it is pretty fast) but there is the last issue remaining which is similar to the meaure which you've created.

So in this file (which I have shared) there is a meaure for Previous value. Issue is whenever we filter the date using slicer, then at the last row of the visual it is showing blank value (logically it is correct because when filter is applied then, there is not any previous value) but by modifying this measure can we do something to get that previous value also.

I tried your previous measures for this issue but those measure were taking so much time to load, so for now I'm looking for a way to modify this (current) measure so that I can also get previous value for the last row of the table.

Here are some screenshots:

when I am not selecting any date then it is showing previous value like you can see in the below screenshot :

So I just want to know from your expertise can we do some small modification in this measure and rectify this issue ?

If you have any questions feel free to ask 🙂

File Link: https://drive.google.com/drive/u/0/folders/1651tuMrez13NX48mrdh_UVSZuk7diGMP

Thanks and Regards
Mihir

Hi,

Can you try the below measure?

I am not sure about the performance, but I tried to fix the measure that can show the previous value.

Prev_value_Energy_consum1 =
VAR Index =
    MAX ( FloatTable[TagIndex] )
VAR Prev_datetime =
    MAXX (
        FILTER (
            ALL ( FloatTable ),
            FloatTable[Date] = MAX ( FloatTable[Date] )
                && FloatTable[Time] < MAX ( FloatTable[Time] )
                && FloatTable[TagIndex] = Index
        ),
        FloatTable[Time]
    )
VAR Prev_date =
    MAXX (
        FILTER (
            ALL ( FloatTable ),
            FloatTable[Date] < MAX ( FloatTable[Date] )
                && FloatTable[TagIndex] = Index
        ),
        FloatTable[Date]
    )
VAR Prev_time =
    MAXX (
        FILTER (
            ALL ( FloatTable ),
            FloatTable[Date] = Prev_date
                && FloatTable[TagIndex] = Index
        ),
        FloatTable[Time]
    )
RETURN
    SWITCH (
        TRUE (),
        NOT ISBLANK ( Prev_datetime ),
            SUMX (
                FILTER (
                    ALL ( FloatTable ),
                    FloatTable[Time] = Prev_datetime
                        && FloatTable[Date] = MAX ( FloatTable[Date] )
                        && FloatTable[TagIndex] = Index
                ),
                FloatTable[Val]
            ),
        CALCULATE (
            SUMX (
                FILTER (
                    ALL ( FloatTable ),
                    FloatTable[Time] = Prev_time
                        && FloatTable[Date] = Prev_date
                        && FloatTable[TagIndex] = Index
                ),
                FloatTable[Val]
            )
        )
    )

Thanks for your measure Jihwan_Kim, but it is very slow...