Min and max date rows for item in each category

[ilamoureuse]

Hello.

I've been trying to solve this for weeks now so I'm asking for some help!

Basically, I have a list of items that can be in several sprints and for each sprint they are in I want to keep the record of the first date IN THE SPRINT and the last date IN THE SPRINT. I tried this in PowerQuery but it gives me the min date accross all sprints, not by sprint :

= Table.Group(#"Source", {"Work Item Id", "Iteration Path"}, {{"DateMin", each Table.Min(_, "Date")}})

Here is my sample data :

SAMPLE DATA
Item ID	Iteration path	State	Date
100	Sprint 1	Open	1/1/2023
100	Sprint 1	Open	2/1/2023
100	Sprint 1	Open	3/1/2023
100	Sprint 1	Closed	4/1/2023
100	Sprint 2	Closed	5/1/2023
100	Sprint 2	Closed	6/1/2023
200	Sprint 1	Open	3/1/2023
200	Sprint 1	Closed	4/1/2023

And the result I'm trying to get using power query :

EXPECTED RESULT
Item ID	Iteration path	State	Date		Comment (not needed in result)
100	Sprint 1	Open	1/1/2023		Min date in sprint 1 for item 100
100	Sprint 1	Closed	4/1/2023		Max date in sprint 1 for item 100
100	Sprint 2	Closed	5/1/2023		Min date in sprint 2 for item 100
100	Sprint 2	Closed	6/1/2023		Max date in sprint 2 for item 100
200	Sprint 1	Open	3/1/2023		Min date in sprint 1 for item 200
200	Sprint 1	Closed	4/1/2023		Max date in sprint 1 for item 200

I don't see how I can upload my sample data file but I copied/pasted the tables above.

Thanks in advance for your help !

[ilamoureuse]

Thank you so much @m_dekorte !

[ThxAlot]

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjQwUNJRCi4oyswrUTAEMv0LUvOAlKG+gaG+kYGRsVKsDm5VRkSpMsavyjknvzg1Bcgwwa3OCFmdKZHqzFDUGRHlOgxV2FwXCwA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Item ID" = _t, #"Iteration path" = _t, State = _t, Date = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Item ID", Int64.Type}, {"Iteration path", type text}, {"State", type text}, {"Date", type date}}),
    Grouped = Table.Group(#"Changed Type", {"Item ID","Iteration path"}, {"Grp", each Table.FromRecords({Table.First(_), Table.Last(_)})}, 0),
    #"Expanded Grp" = Table.ExpandTableColumn(Grouped, "Grp", {"State", "Date"}, {"State", "Date"})
in
    #"Expanded Grp"

[m_dekorte · Accepted solution]

Hi @ilamoureuse,

You must have been so close, you were on the right track...

Here's a fully user interface driven solution.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjQwUNJRCi4oyswrUTAEMv0LUvOAlIGhLhAZGSvF6uBRZESMImN8ipxz8otTU0DKTHApM0JRZkqcMjMkZUbEuAxDERaXxQIA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Item ID" = _t, #"Iteration path" = _t, State = _t, Date = _t]),
    ChType = Table.TransformColumnTypes(Source,{{"Date", type date}}),
    GroupRows = Table.Group(ChType, {"Item ID", "Iteration path"}, {{"Min Date", each List.Min([Date]), type nullable date}, {"Max Date", each List.Max([Date]), type nullable date}}),
    UnpivotOthers = Table.UnpivotOtherColumns(GroupRows, {"Item ID", "Iteration path"}, "Attribute", "Value"),
    SelfMerge = Table.NestedJoin(UnpivotOthers, {"Item ID", "Iteration path", "Value"}, ChType, {"Item ID", "Iteration path", "Date"}, "UnpivotOthers", JoinKind.LeftOuter),
    GetState = Table.ExpandTableColumn(SelfMerge, "UnpivotOthers", {"State"}, {"State"})
in
    GetState

The Group by returns this

Selecting both columns "Item ID" and "Iteration path" and unpivoting others

Note you can rename both new "Attribute" and "Value" columns here directly inside the formula bar

And finally do a self merge to get the State

Ps. If this helps solve your query please mark this post as Solution, thanks!