Eliminating table entries with multiple records

[pntlindsay]

Hi,

I would appreciate help with the following.  I feel the solution is simple but somehow I am missing it.

I have a table with the following data:

ID       Date             Result

1         2/11/2019    NEGATIVE

1         1/1/2020      NEGATIVE

1         4/3/2020      POSITIVE

2         2/2/2020      NEGATIVE

3         2/3/2020      NEGATIVE

3         4/4/2020      NEGATIVE 

I want to create a table with entries, where there is a NEGATIVE result and where there has not been a subsequent POSITIVE result. Using the above the result will be:

ID       Date             Result

2         2/2/2020      NEGATIVE

3         2/3/2020      NEGATIVE

3         4/4/2020      NEGATIVE

Thanks in advance for any help with this.

Regards, Phillip

[ryan_mayu · Accepted solution]

@pntlindsay 

you can create a new table

Table = 
VAR tbl=ADDCOLUMNS(Sheet4,"result2",CALCULATE(COUNTX(FILTER(Sheet4,Sheet4[ Result]="POSITIVE"),Sheet4[ Result]),ALLEXCEPT(Sheet4,Sheet4[ID ])))
return SELECTCOLUMNS(FILTER(tbl,ISBLANK([result2])),"ID",Sheet4[ID ],"Date",'Sheet4'[ Date ],"Result",Sheet4[ Result])

 

[dax · Accepted solution]

Hi @pntlindsay ,

You also could use M code to achieve this goal(use this in power query editor, Transform Data->Advanced editor).

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUTLSNzTUNzIwtASy/VzdHUM8w1yVYnUgkob6IDkjA2xyJvrGMLkA/2BPuJwR2FAjrPqMwXLGOOVM9E0w5WIB", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [ID = _t, date = _t, result = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ID", Int64.Type}, {"date", type date}, {"result", type text}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"ID"}, {{"combine", each Text.Combine([result], ","), type text}, {"all", each _, type table [ID=number, date=date, result=text]}}),
    #"Filtered Rows" = Table.SelectRows(#"Grouped Rows", each not Text.Contains([combine], "POSITIVE")),
    #"Expanded all" = Table.ExpandTableColumn(#"Filtered Rows", "all", {"date", "result"}, {"date", "result"}),
    #"Removed Columns" = Table.RemoveColumns(#"Expanded all",{"combine"})
in
    #"Removed Columns"

Best Regards,
Zoe Zhi

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[amitchandak]

@pntlindsay , Create a new table like

filter(summarize(Table, Table[ID],, Table[ID] , table[Result], "_1",calculated(countrows(filter(Table,Table[Result]="NEGATIVE")),allexcept(Table[Id]))+0),[_1]=0)

[ryan_mayu · Accepted solution]

@pntlindsay 

you can create a new table

Table = 
VAR tbl=ADDCOLUMNS(Sheet4,"result2",CALCULATE(COUNTX(FILTER(Sheet4,Sheet4[ Result]="POSITIVE"),Sheet4[ Result]),ALLEXCEPT(Sheet4,Sheet4[ID ])))
return SELECTCOLUMNS(FILTER(tbl,ISBLANK([result2])),"ID",Sheet4[ID ],"Date",'Sheet4'[ Date ],"Result",Sheet4[ Result])