Use List entry in Table.SelectRows function

[TLGemp]

Hello everybody.

I have a problem in using a List as argument for a column/record in the function Table.SelectRows.

From my source I got TABLE where one COLUMN, eg. Column3, contains all necessary information. The challenge is that the column I am looking for is not always Column3. It can be also Column4 or Column5. I managed to find a way that I got back the correct column name in a LIST. Now I want to use this LIST entry in the Table.SelectRows function to get rid of all other unwanted stuff.  But this do not want to work.

= Table.SelectRows(Source, each ([Referenz by using the LIST] = "Value for Filtering"))

So, what will be the step to go from e.g. {Column3} to the Source[Column3] referenz.

Thanks.

[TLGemp]

Source value - the column of des1,des2,des3 can vary and is not always the same

null	null	null	null
null	null	null	null
null	des1	null	val1
null	des2	null	val2
null	des3	null	val3

Result

des1	des2	des3
val1	val2	val3

let
    Quelle = Excel.CurrentWorkbook(){[Name="Tabelle4"]}[Content],
    #"Geänderter Typ" = Table.TransformColumnTypes(Quelle,{{"Column1", type any}, {"Column2", type text}, {"Column3", type any}, {"Column4", type text}}),
    #"Tiefer gestufte Header" = Table.DemoteHeaders(#"Geänderter Typ"),
    #"Transponierte Tabelle" = Table.Transpose(#"Tiefer gestufte Header"),
    #"Gefilterte Zeilen" = Table.SelectRows(#"Transponierte Tabelle", each ([Column4] = "Des1")),
    Column1 = #"Gefilterte Zeilen"[Column1],
    Benutzerdefiniert1 = Table.SelectRows(Quelle, each ([Column2] <> null))
in
    Benutzerdefiniert1

In the line Benutzerdefiniert1 I would like to use the list Column1 from the line above instead of the static [colum2]. This should make the code more dynamic.

[v-shex-msft · Accepted solution]

Hi @TLGemp,

Here is query table code that I used to transform table structure based on 'transpose table' and 'remove blank row' functions to output expected table structure without specific column names as conditions, you can try it if helps:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WUtKBoVgdLLyU1GJDiEhZYo4hkqgRXNQISdQYLmqsFBsLAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t, Column3 = _t, Column4 = _t]),
    #"Removed Blank Rows" = Table.SelectRows(Source, each not List.IsEmpty(List.RemoveMatchingItems(Record.FieldValues(_), {"", null}))),
    #"Transposed Table" = Table.Transpose(#"Removed Blank Rows"),
    #"Removed Blank Rows1" = Table.SelectRows(#"Transposed Table", each not List.IsEmpty(List.RemoveMatchingItems(Record.FieldValues(_), {"", null}))),
    #"Promoted Headers" = Table.PromoteHeaders(#"Removed Blank Rows1", [PromoteAllScalars=true]),
    #"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"des1", type text}, {"des2", type text}, {"des3", type text}})
in
    #"Changed Type"

Regards,

Xiaoxin Sheng

[v-shex-msft]

Hi @TLGemp ,

Can you please share a pbix or some dummy data that keep the raw data structure with expected results? It should help us clarify your scenario and test to coding formula.

How to Get Your Question Answered Quickly  

Regards,

Xiaoxin Sheng