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Arnoh
Helper III
Helper III

finding first record

Hi I have the following issue:

 

I have a table as below

 

 

idsource_id 
100  
101100 
102  
103102 
104101 
105104 

 

 

I want to find the first record of 

so the result should look like this

 

idsource_idfirst_id
100 100
101100100
102 102
103102102
104101100
105104100

 

Thanx for helping!

4 REPLIES 4
ThxAlot
Super User
Super User

Use recursive function in PQ

 

 

let
    Fx = (id, src) =>
    let pos = List.PositionOf(ID, src)
    in if pos > -1 then @Fx(ID{pos}, Src{pos}) else id,

    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjQwUNJRUorVATENgUyQAIRnhJAwBksYQXkmYJ4hlGcK5pkoxcYCAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [id = _t, source_id = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"id", Int64.Type}, {"source_id", Int64.Type}}),
    ID = #"Changed Type"[id], src=#"Changed Type"[source_id],
    
    Traced = Table.AddColumn(#"Changed Type", "Root", each fx([id], [source_id]))
in
    Traced

 

 

 

ThxAlot_0-1690367123941.png



Expertise = List.Accumulate(


        {Days as from Today},


        {Skills and Knowledge},


        (Current, Everyday) => Current & Day.LeanAndPractise(Everyday)


)



Hi Thanx for your reaction,

 

I can't get it working. I did try to copy your code in power query. 

Can you add extra information on how to create the recursive function in Power Query? 

 

Thanx 

Kev74
Frequent Visitor

Hi try it :

 

first_id = IF(ISBLANK(LOOKUPVALUE('Table'[id], 'Table'[id], 'Table'[source_id])), 'Table'[id], LOOKUPVALUE('Table'[id], 'Table'[id], 'Table'[source_id]))

Hi Thanx for your reaction.

But this is n't going to work. 

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