Replace duplicate actions value except the first item for a user

[SubodhPatra]

Hi,

I am new to Power Query and got stucked to transform the data in Actions column for duplicate entries except the first one. The data is as follows

Mobile Number	Actions	Date
919191919191	initial_items	20-Jul-2022
919191919191	like	20-Jul-2022
919191919191	initial_items	25-Jul-2022
919191919191	like	25-Jul-2022
919191919191	like	29-Jul-2022
919191919191	initial_items	06-Aug-2022
919191919191	initial_items	09-Aug-2022
919191919191	like	09-Aug-2022
919191919191	initial_items	22-Aug-2022
919191919191	like	22-Aug-2022

The requirement is to change "initial_items" in Actions column to be replaced to "more_items" except the first entry i.e. 20-Jul-2022. The expected result would be as below:

Mobile Number	Actions	Date
919191919191	initial_items	20-Jul-2022
919191919191	like	20-Jul-2022
919191919191	more_items	25-Jul-2022
919191919191	like	25-Jul-2022
919191919191	like	29-Jul-2022
919191919191	more_items	06-Aug-2022
919191919191	more_items	09-Aug-2022
919191919191	like	09-Aug-2022
919191919191	more_items	22-Aug-2022
919191919191	like	22-Aug-2022

Please help me.

[Vijay_A_Verma]

See the working here - Open a blank query - Home - Advanced Editor - Remove everything from there and paste the below code to test (later on when you use the query on your dataset, you will have to change the source appropriately. If you have columns other than these, then delete Changed type step and do a Changed type for complete table from UI again)

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WsjREQCUdpcy8zJLMxJz4zJLU3GIg38hA16s0R9fISClWB0NxTmZ2KiE1GAaaEmEgMWosSbDUTNexNJ1ItZZ41ELtxqcEw79GhM1DUhMLAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Mobile Number" = _t, Actions = _t, Date = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Mobile Number", Int64.Type}, {"Actions", type text}, {"Date", type date}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 0, 1, Int64.Type),
    #"Filtered Rows" = Table.SelectRows(#"Added Index", each ([Actions] = "initial_items")),
    #"Removed Top Rows" = Table.Skip(#"Filtered Rows",1),
    #"Merged Queries" = Table.NestedJoin(#"Added Index", {"Index"}, #"Removed Top Rows", {"Index"}, "Removed Top Rows", JoinKind.LeftOuter),
    #"Expanded Removed Top Rows" = Table.ExpandTableColumn(#"Merged Queries", "Removed Top Rows", {"Index"}, {"Index.1"}),
    Custom1 = Table.ReplaceValue(#"Expanded Removed Top Rows",each [Actions],each if [Index.1] <> null then "more_items" else [Actions],Replacer.ReplaceValue,{"Actions"}),
    #"Sorted Rows" = Table.Sort(Custom1,{{"Index", Order.Ascending}}),
    #"Removed Columns" = Table.RemoveColumns(#"Sorted Rows",{"Index.1", "Index"})
in
    #"Removed Columns"

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[SubodhPatra]

Hi Vijay,

Thanks for the Power Query code!

It is working fine for a single user (919191919191) but I have more than one users in the table.

Requesting you to modify the code for multiple users.

[Vijay_A_Verma]

Here it is

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WsjREQCUdpcy8zJLMxJz4zJLU3GIg38hA16s0R9fISClWB0NxTmZ2KiE1GAaaEmEgMWosSbDUTNexNJ1YBxLhY0sqm2dkhMNAIyJC2YgUS8k1EFcIIpmHUBILAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Mobile Number" = _t, Actions = _t, Date = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Mobile Number", type text}, {"Actions", type text}, {"Date", type date}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 0, 1, Int64.Type),
    #"Grouped Rows" = Table.Group(#"Added Index", {"Mobile Number"}, {{"AllRows", each _}}),
    fxProcess=(Tbl)=>
    let
        #"Filtered Rows" = Table.SelectRows(Tbl, each ([Actions] = "initial_items")),
        #"Removed Top Rows" = Table.Skip(#"Filtered Rows",1),
        #"Merged Queries" = Table.NestedJoin(Tbl, {"Index"}, #"Removed Top Rows", {"Index"}, "Removed Top Rows", JoinKind.LeftOuter),
        #"Expanded Removed Top Rows" = Table.ExpandTableColumn(#"Merged Queries", "Removed Top Rows", {"Index"}, {"Index.1"}),
        Custom2 = Table.ReplaceValue(#"Expanded Removed Top Rows",each [Actions],each if [Index.1] <> null then "more_items" else [Actions],Replacer.ReplaceValue,{"Actions"}),
        #"Removed Columns" = Table.RemoveColumns(Custom2,{"Index.1"})
    in
        #"Removed Columns",
    #"Added Custom" = Table.AddColumn(#"Grouped Rows", "Custom", each fxProcess([AllRows])),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"AllRows"}),
    #"Expanded Custom" = Table.ExpandTableColumn(#"Removed Columns", "Custom", {"Actions", "Date", "Index"}, {"Actions", "Date", "Index"}),
    #"Sorted Rows" = Table.Sort(#"Expanded Custom",{{"Index", Order.Ascending}}),
    #"Removed Columns1" = Table.RemoveColumns(#"Sorted Rows",{"Index"})
in
    #"Removed Columns1"

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[SubodhPatra · Accepted solution]

Hi Vijay,

Many many thanks from the bottom of my heart!

The code is working fine and I was eagerly waiting for your reply.

Really, you are a "Super User".

With Regards,

Subodh