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Hi,
I want to filter a table so that I keep those rows that have the maximum value in a column. For example, I have:
Name | Col 2 | Col 3 | Col 4 | Revision no |
A | .. | .. | .. | 0 |
A | .. | .. | .. | 1 |
A | .. | .. | .. | 2 |
B | .. | .. | .. | 0 |
B | .. | .. | .. | 1 |
C | .. | .. | .. | 0 |
D | .. | .. | .. | 0 |
After filtering; I want:
Name | Col 2 | Col 3 | Col 4 | Revision no |
A | .. | .. | .. | 2 |
B | .. | .. | .. | 1 |
C | .. | .. | .. | 0 |
D | .. | .. | .. | 0 |
Is there a simple way of avhieving this result?
Solved! Go to Solution.
Hi, @bkermen
Try this:
let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUTIEYiMgNgZiA6VYHYgoTMQErAImChMxBasAiTphNcEJqwnOWNW6YIrGAgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Name = _t, #"Col 2" = _t, #"Col 3" = _t, #"Col 4" = _t, #"Revision no" = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Name", type text}, {"Col 2", type text}, {"Col 3", type text}, {"Col 4", type text}, {"Revision no", Int64.Type}}),
T2=Table.Group(#"Changed Type", {"Name"}, {{"max", each List.Max([Revision no]), type nullable number}}),
#"Merged Queries" = Table.NestedJoin(#"Changed Type", {"Name", "Revision no"}, T2, {"Name", "max"}, "Table (2)", JoinKind.LeftOuter),
#"Expanded Table (2)" = Table.ExpandTableColumn(#"Merged Queries", "Table (2)", {"max"}, {"Table (2).max"}),
#"Filtered Rows" = Table.SelectRows(#"Expanded Table (2)", each ([#"Table (2).max"] <> null)),
#"Removed Columns" = Table.RemoveColumns(#"Filtered Rows",{"Table (2).max"})
in
#"Removed Columns"
Result:
Please refer to the attachment below for details. Hope this helps.
Best Regards,
Community Support Team _ Zeon Zheng
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Hi, @bkermen
Try this:
let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUTIEYiMgNgZiA6VYHYgoTMQErAImChMxBasAiTphNcEJqwnOWNW6YIrGAgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Name = _t, #"Col 2" = _t, #"Col 3" = _t, #"Col 4" = _t, #"Revision no" = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Name", type text}, {"Col 2", type text}, {"Col 3", type text}, {"Col 4", type text}, {"Revision no", Int64.Type}}),
T2=Table.Group(#"Changed Type", {"Name"}, {{"max", each List.Max([Revision no]), type nullable number}}),
#"Merged Queries" = Table.NestedJoin(#"Changed Type", {"Name", "Revision no"}, T2, {"Name", "max"}, "Table (2)", JoinKind.LeftOuter),
#"Expanded Table (2)" = Table.ExpandTableColumn(#"Merged Queries", "Table (2)", {"max"}, {"Table (2).max"}),
#"Filtered Rows" = Table.SelectRows(#"Expanded Table (2)", each ([#"Table (2).max"] <> null)),
#"Removed Columns" = Table.RemoveColumns(#"Filtered Rows",{"Table (2).max"})
in
#"Removed Columns"
Result:
Please refer to the attachment below for details. Hope this helps.
Best Regards,
Community Support Team _ Zeon Zheng
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
@smpa01 This seems to work only if the values in the other columns (Col 2-4) are identical. What I actually want to do is to filter the data in Power Query Editor so that only the filtered rows are in the data model.
@bkermen you can use a measure like this
Measure = CALCULATE(MAX('Table'[Revision no]),ALLEXCEPT('Table','Table'[Name]))
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