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lklenner's avatar
lklenner
Frequent Visitor
4 years ago

Table Join with duplicate values need advice

Good morning,

 

I have a set of data , however, as you would expect when doing a full join, duplicate values are created for missing rows.  The data is correct, but my question is, what is the best way to remove the duplicate values in eQty so that the totals align?  Is there a good way to do this?

 

 

Thanks in advance

Need Help

2 Replies

  • v-yingjl's avatar
    v-yingjl
    Community Support
    4 years ago

    Hi lklenner ,

    One of the join kinds available in the Merge dialog box in Power Query is a full outer join, which brings in all the rows from both the left and right tables.

     

    If want to get the expected output, need to add an index column in each table, and then use merge based on Component column and Index column.

     

    Example:

    let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WCgq2cjYytrSwNDBQ0lFyNTAwNDfSNTI2NATyDI30gKKxOthUWRjpmlkaWKKrcrQ0MrIASiPMMjQwMzACKQOrigUA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Component = _t, Id = _t, eQty = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Component", type text}, {"Id", type text}, {"eQty", Int64.Type}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 1, 1, Int64.Type),
    #"Merged Queries" = Table.NestedJoin(#"Added Index", {"Component", "Index"}, Table2, {"Component", "Index"}, "Table2", JoinKind.FullOuter),
    #"Expanded Table2" = Table.ExpandTableColumn(#"Merged Queries", "Table2", {"Component", "Id", "eQty"}, {"Table2.Component", "Table2.Id", "Table2.eQty"}),
    #"Removed Columns" = Table.RemoveColumns(#"Expanded Table2",{"Index"}),
    #"Sorted Rows" = Table.Sort(#"Removed Columns",{{"Component", Order.Descending}, {"Table2.Component", Order.Descending}}),
    #"Filled Down" = Table.FillDown(#"Sorted Rows",{"Component", "Table2.Component"})
in
    #"Filled Down"

     

    Best Regards,
    Community Support Team _ Yingjie Li
    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

     

  • lklenner's avatar
    lklenner
    Frequent Visitor
    4 years ago

    Hi v-yingjl 

     

    Thanks for your response, however, this does not work.  These are two seperate tables that are being joined, with a different order and rows.  Creating new indices and merging on them does not work.

     

    Below is what I'm using at the moment.

     

    let
    Source = Table.NestedJoin(MBOMLookup,
      {
        "Component",
        "Component unit",
        "Proj",
        "MBOMData.EBOM"
      },
      EBOMLookup,
      {
        "Component",
        "Component unit",
        "Proj",
        "EBOMData.Immediate Parent"
      },
      "EBOMLookup",
      JoinKind.FullOuter
),