Check some column have some values

[kongyuancn]

Hello,

I have a problem

I want to add a column "Yes_Col_Have_B_OR_C"  to check the columns whose name begins with "YES" and check if any of the value is "b" or "c".

In this table, I only wants to check column Yes_1, Yes_2 and Yes_4.

If value under these col is "b" or "c", then I set the result as "TRUE"

How to write the Power Query M statements?

Thanks,

Yuan Kong

[PhilipTreacy]

Hi @kongyuancn 

Try this code.  You can also download this PBIX file with the same example code

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WSlTSUUoC4mQ4jtWBiIIwjAKJJUH4yVCxRLBgMkQwCSqYpBQbCwA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [No_1 = _t, Yes_1 = _t, Yes_2 = _t, No_3 = _t, Yes_4 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"No_1", type text}, {"Yes_1", type text}, {"Yes_2", type text}, {"No_3", type text}, {"Yes_4", type text}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Yes_Col_Have_B_or_C", each if ([Yes_1] ="b" or [Yes_2] = "b" or [Yes_4] = "b") or ([Yes_1] ="c" or [Yes_2] = "c" or [Yes_4] = "c") then true else false)
in
    #"Added Custom"

Regards

Phil

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[kongyuancn]

Thank you Phil for your answer. But I still have a question:

There maybe a lot of "Yes" columns, how can I use a function (Ex: List.FindText(Table.ColumnNames(#"Table"), "Yes")) instead of specifying those columns one by one?

Further more, I have a matching list (not only "b" and "c"). Is it possible that using the list in the formular instead of specifying them one by one?

[Jimmy801 · Accepted solution]

Hello @kongyuancn 

check out this dynamic solution. Use variable ColStartWith to identify all columns that start with that word. Use variable ContentSearchFor to define a list of words to check for

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WSlTSUUoC4mQ4jtWBiIIwjAKJJUH4yVCxRLBgMkQwCSqYpBQbCwA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [No_1 = _t, Yes_1 = _t, Yes_2 = _t, No_3 = _t, Yes_4 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"No_1", type text}, {"Yes_1", type text}, {"Yes_2", type text}, {"No_3", type text}, {"Yes_4", type text}}),
    ColStartWIth = "Yes",
    ContentSearchFor = {"b", "c"},
    GetYesColumns = List.Select(Table.ColumnNames(#"Changed Type"),  each Text.StartsWith(_, ColStartWIth)),
    CheckIfColHasContent = Table.AddColumn
    (
        #"Changed Type",
        "CheckYesColumnsForContent",
        (row)=> 
        let 
            GetTable = Record.ToTable(row),
            FilterForColumns = Table.SelectRows(GetTable, (rowsel)=> List.Contains(GetYesColumns,  rowsel[Name])),
            FilterForContent = Table.SelectRows(FilterForColumns, (rowsel)=> List.Contains(ContentSearchFor, rowsel[Value]))
        in 
            if Table.IsEmpty(FilterForContent) then false else true

    )
in
    CheckIfColHasContent

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy

[PhilipTreacy]

Hi @kongyuancn 

You can use this code - here's the PBIX file

It searches for any column names containing "Yes"and then just uses those to create the True/False column

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WSlTSUUoC4mQ4jtWBiIIwjAKJJUH4yVCxRLBgMkQwCSqYpBQbCwA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [No_1 = _t, Yes_1 = _t, Yes_2 = _t, No_3 = _t, Yes_4 = _t]),
    Tab = Table.SelectColumns(Source, List.FindText(Table.ColumnNames(Source),"Yes")),
    TF = List.Transform(Table.ToList(Tab), each Text.Contains(_,"b") or Text.Contains(_,"c")),
    Columns = List.Combine({Table.ToColumns(Source),{TF}}),
    #"Converted to Table" = Table.FromColumns(Columns,List.Combine({Table.ColumnNames(Source),{"Yes_Col_Have_B_or_C"}}))

in
    #"Converted to Table"

Phil

---

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If my answer helped solve your problem, give it a kudos by clicking on the Thumbs Up.