Forum Discussion

A-kitaev's avatar
A-kitaev
New Member
9 years ago
Solved

Remove duplicates - keep last vs keep first

Hi, I need to remove rows in a table that have duplicate values and I need to keep last one. Power BI by default keeps first one regardless of sorting order. I tried to use buffered table in advan...
  • v-sihou-msft's avatar
    v-sihou-msft
    9 years ago

    A-kitaev

     

    In this scenario, if you want to keep the last records associated with each group column. You can build a calculated table aggregating values with max sort within each group.  

     

    I assume you a have a table like below:

     

     

    Then you can create a calculated table like below:

     

    Table = SUMMARIZE(
	Table3,Table3[Name],
	"Last Value",
	CALCULATE(SUM(Table3[Value]),
		FILTER(Table3,Table3[Sort]=MAX(Table3[Sort]))
	)
	)

     

     

    Regards,

hmenco's avatar
hmenco
Frequent Visitor
5 years ago

Hi Ashish_Mathur, thank you but do you have another work around? The M query takes time to process big data. 

Ashish_Mathur's avatar
Ashish_Mathur
Super User
5 years ago

I have a DAX calculated column alternative (not an M query alternative).  Are you interested in that?

  • Ashish_Mathur's avatar
    Ashish_Mathur
    Super User
    5 years ago

    Hi,

    Try this calculated column formula

    =calculate(countrows(data),filter(data,data[OrderNumber]=earlier(data[OrderNumber])&&data[RunDate]<=earlier(data[RunDate])))

    Hope this helps.

  • hmenco's avatar
    hmenco
    Frequent Visitor
    5 years ago

    Okay with DAX, if it will perform faster than the M query and as long as it meets the desired outcome as well! Many thanks!