Table.CombineColumns - Query Editor

[viferenc]

Dear All, 

I tried to solve my problem by myself but it did not work.

I would need your help in the follwoing topic.

In the Query Editor I have 3 different tables, with different strucutre. 

I would like to combine from these 3 tables only specific columns in a new table.

This I would like to do already in the Query Editor and not outside query editor with union and selectedcolumns.

Could you please help me how does it work in query editor?

Thank you very much for your help.

Br

Feri

Could you please give 

[v-juanli-msft · Accepted solution]

Hi

As you said, you want to combine from these 3 tables only specific columns in a new table but to do it in the Query Editor instead of using DAX function “ union and selectedcolumns”.

Here is a simple example to do this.

Select the first two columns from each table of the three tables(eg. From excel)  and add them into a new table.

Table1

Table2

Table3

New Table

In query editor, New Source>Blank Query, code in advanced editor,

let
    Source1 = Table1,
    Source2 = Table2,
    Source3 = Table3,
    AppendColumns1=Table.SelectColumns(Source1, {"columnA","columnB"}),
    AppendColumns2=Table.SelectColumns(Source2, {"columnC","columnD"}),
    AppendColumns3=Table.SelectColumns(Source3, {"columnE","columnF"}),
    RenameAppendColumns2 = Table.RenameColumns(AppendColumns2,{{"columnC", "columnA"}, {"columnD", "columnB"}}),
    RenameAppendColumns3 = Table.RenameColumns(AppendColumns3,{{"columnE", "columnA"}, {"columnF", "columnB"}}), 
    #"Appended Query1" = Table.Combine({AppendColumns1, RenameAppendColumns2}),
    #"Appended Query2" = Table.Combine({#"Appended Query1", RenameAppendColumns3})
in
    #"Appended Query2"

Best Regards

Maggie