Creating Trend comparing current week with previous week

[harirao]

Hi Team,

Required assistance, I am trying to create weekly trend comparing current wk vs previous week, used below dax  but not getting correct result
Colum:

PreviousReportDate = DATEADD(Query1[reportdate],-7,DAY)

Measure, highlighted in red is also measure 

Trend =

CALCULATE([%6week_1&2], FILTER(ALL(Query1),Query1[reportdate]=SELECTEDVALUE(Query1[PreviousReportDate]) && Query1[subregion]=SELECTEDVALUE(Query1[subregion])))

Below is screen print where Trend suppose to get 18th data but getting incorrect result 
25th Data

18th 

18th Data
Once i get correct result for Trend i can create new Measure as per below comparison.



Regards,
Hari

[AllisonKennedy · Accepted solution]

@harirao  I'm assuming you have a DimDate table?? 

If not, get one, they make a big difference:

https://excelwithallison.blogspot.com/2020/04/dimdate-what-why-and-how.html

Once you have the date table, I would consider a slightly different approach to this problem, using time intelligence to change the filter context within the measure, rather than creating a calculated column for previous period. 

So something like: 

Trend =

CALCULATE([%6week_1&2], DATEADD(DimDate[Date], -7, DAY))

No need to mess with region as that will come automatically from the context of the matrix. 

@harirao  A small update:

In the slicer, either use the:

DimDate[Date] ,

DimDate[ReportWeek]

DimDate[Week]

Basically anything from the DimDate table NOT the Query1[reportdate]

[amitchandak · Accepted solution]

@harirao , refer to my blog on how to work with the week; this week vs last week etc.

https://community.powerbi.com/t5/Community-Blog/Week-Is-Not-So-Weak-WTD-Last-WTD-and-This-Week-vs-La...

To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s. Refer :
https://radacad.com/creating-calendar-table-in-power-bi-using-dax-functions
https://www.archerpoint.com/blog/Posts/creating-date-table-power-bi
https://www.sqlbi.com/articles/creating-a-simple-date-table-in-dax/

See if my webinar on Time Intelligence can help: https://community.powerbi.com/t5/Webinars-and-Video-Gallery/PowerBI-Time-Intelligence-Calendar-WTD-Y...


Appreciate your Kudos.

[AllisonKennedy · Accepted solution]

@harirao  I'm assuming you have a DimDate table?? 

If not, get one, they make a big difference:

https://excelwithallison.blogspot.com/2020/04/dimdate-what-why-and-how.html

Once you have the date table, I would consider a slightly different approach to this problem, using time intelligence to change the filter context within the measure, rather than creating a calculated column for previous period. 

So something like: 

Trend =

CALCULATE([%6week_1&2], DATEADD(DimDate[Date], -7, DAY))

No need to mess with region as that will come automatically from the context of the matrix. 

@harirao  A small update:

In the slicer, either use the:

DimDate[Date] ,

DimDate[ReportWeek]

DimDate[Week]

Basically anything from the DimDate table NOT the Query1[reportdate]