Index column only for specific value (Conditional index column)

Hi Anonymous,

I have a solution for you. Click through the steps and you will see how it works.

I create an index on the original table. Then I create a second table "KeywordRowFullIndex" which contains only "Keyword" rows and create a secondary index on this smaller table. And in the end I join them together on the FullIndex.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8k6tLM8vSlGK1YlWCkmtKFEwVACBGgWEiBFEBCyAodwYSRIsYIIuYIpPuxlMMhYA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Column1 = _t]),
    IndexColumn = Table.AddIndexColumn(Source, "FullIndex", 0, 1),
    KeywordRowFullIndex = Table.SelectRows(IndexColumn, each [Column1] = "Keyword"),
    SecondaryIndex = Table.AddIndexColumn(KeywordRowFullIndex, "Index", 1, 1),
    Join = Table.NestedJoin(IndexColumn, "FullIndex", SecondaryIndex, "FullIndex", "SecondaryIndex"),
    ExpandedSecondaryIndex = Table.ExpandTableColumn(Join, "SecondaryIndex", {"Index"}, {"Index"}),
    RemoveFullIndexColumn = Table.RemoveColumns(ExpandedSecondaryIndex,{"FullIndex"})
in
    RemoveFullIndexColumn

Hi Anonymous 

As tested, Nolock 's solution should work.

You don't need to filter data, just check my pbix.

Best Regards
Maggie

Community Support Team _ Maggie Li
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