Start date and end date

[Rune_]

Hi 
I have three columns. 

Posting date, Job No_ and Job Task No_

I would like to make to extra columns with start date and end date. 

Start date would be List.Min of Posting date for specific Job No_ and Job Task No_

End date would be List.Max of Posting date for specific Job No_ and Job Task No_

Posting Date	Job No_	Job Task No_	Start date
10.07.2018	10078	01	09.07.2018
13.07.2018	10078	01	09.07.2018
09.07.2018	10078	01	09.07.2018
09.07.2018	10078	01	09.07.2018
10.07.2018	10078	01	09.07.2018
10.07.2018	10078	01	09.07.2018
10.07.2018	10078	01	09.07.2018
10.07.2018	10078	01	09.07.2018
10.07.2018	10078	01	09.07.2018
10.07.2018	10078	01	09.07.2018

How would I write this in Power Query. 

[AlB]

@Rune_ 

Another option, albeit perhaps slower:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjTQMzDXMzIwtFDSAXIMzEG0gaFSrA5Qzhi3nIEleXJ47RsscrEA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Posting Date" = _t, #"Job No_" = _t, #"Job Task No_" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Posting Date", type date}, {"Job No_", Int64.Type}}),

    #"Added Custom" = Table.AddColumn(#"Changed Type", "Star Date", each List.Min(Table.SelectRows(#"Changed Type", (inner)=>[[Job No_], [Job Task No_]] = inner[[Job No_], [Job Task No_]])[Posting Date]), type date),
    #"Added Custom1" = Table.AddColumn(#"Added Custom", "End Date", each List.Max(Table.SelectRows(#"Changed Type", (inner)=>[[Job No_], [Job Task No_]] = inner[[Job No_], [Job Task No_]])[Posting Date]), type date)
in
    #"Added Custom1"

Please mark the question solved when done and consider giving a thumbs up if posts are helpful.

Contact me privately for support with any larger-scale BI needs, tutoring, etc.

Cheers 

[Jimmy801 · Accepted solution]

Hello @Rune_ 

group your data on you job-columns and add 3 functions.

One all rows, one min on Posting date and one max on Posting date. Afterwards expand your AllRows-Column

Here a example

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjTQMzDXMzIwtFDSAXIMzEG0gaFSrA5Qzhi3nIEleXJ47RsscrEA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Posting Date" = _t, #"Job No_" = _t, #"Job Task No_" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Posting Date", type date}, {"Job No_", Int64.Type}, {"Job Task No_", Int64.Type}},"de-DE"),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Job No_", "Job Task No_"}, {{"AllRows", each _, type table [Posting Date=date, Job No_=number, Job Task No_=number]}, {"Start Date", each List.Min([Posting Date]), type date}, {"End Date", each List.Max([Posting Date]), type date}}),
    #"Expanded AllRows" = Table.ExpandTableColumn(#"Grouped Rows", "AllRows", {"Posting Date"}, {"Posting Date"})
in
    #"Expanded AllRows"

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy

[AlB]

Hi @Rune_ 

Please always show your sample data in text-tabular format in addition to (or instead of) the screen captures. A screen cap doesn't allow people to readily copy the data.

And please show the expected result for your sample data as well

Please mark the question solved when done and consider giving a thumbs up if posts are helpful.

Contact me privately for support with any larger-scale BI needs, tutoring, etc.

Cheers