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Anonymous
Not applicable

Multi Column Relationships in the same table

‎11-13-2018 08:58 AM

Hi All, 

 

First post, I have looked for a previous answer on this and havent found something that fits.

I cant have multiple active relationships on the same table to multiple columns. I am trying to avoid a bridge table if possible.

 

So i am hoping that you Datanauts might be able to help.

 

The challenge.

 

I have two tables. Table A contains a column that has a number of unique keys. Table B has a number of columns, the key value could appear in any one of three or not at all.

 

I was thinking that a custom column with an IF style logic of

ID = IF TableA[KEY] matches TableB[Col1] then =TableB[Col1] else

        IF TableA[KEY] matches TableB[Col2] then =TableB[Col2] else

        IF TableA[KEY] matches TableB[Col3] then =TableB[Col3] else

="No Member"

 

Hopefully that makes sense from a logic perspective i am stuggling with the syntax.

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LivioLanzo
Solution Sage
Solution Sage
In response to Anonymous

‎11-14-2018 12:14 AM

try like this:

 

let

    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("XY3LCQAxCER78ZyL31qSlfTfxo6ysCGDhyc+nExiGqTC5gGo2SNJAE8HMDsAFi2tBMW6Oqfw/SnBTuH/XycHiF6NcRWFeZ/2Cw==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [UID = _t, A = _t, B = _t, C = _t]),
    
    ChangedType = Table.TransformColumnTypes(Source,{{"UID", Int64.Type}, {"A", type text}, {"B", type text}, {"C", type text}}),
    
    AddIDCol = Table.AddColumn( 
                        ChangedType, 
                        "ID",
                   each if 
                            [C] <> "" 
                        then 
                            [C]
                        else
                            if 
                                [B] <> ""
                            then
                                [B]
                            else
                                [A],
                            type text
    )
                            
    
    
in
    AddIDCol

 


 


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