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Anonymous's avatar
Anonymous
Not applicable
6 years ago
Solved

extract minimum and maximum in a category?

Dears,

 

i need to extract the first and last date of postings on projects, i only need this information. I grouped by projects and date, and now i'd like to delete all dates between first and last posting. in case there is only 1 posting on a project, this posting should remain as first and last.

 

the desired result are that the blue outlined lines remain. i thought already about creating a tabel for max values and a second one for minimum values of the date. but i don't get the clue how to check if the project in one line is the same or different to the project in the next line.

Need Help
  • Jimmy801's avatar
    Jimmy801
    6 years ago

    Hello Anonymous ,

     

    Use Table.Group for this and select Min and Max for the Date-column .

    Here a code example

    let
	Source = #table
	(
		{"Project","Date"},
		{
			{"A","43466"},	{"A","43467"},	{"A","43468"},	{"A","43469"},	{"B","43470"},	{"B","43471"},	{"B","43472"},	{"B","43473"},	{"B","43474"},	{"C","43475"},	
			{"C","43476"},	{"C","43477"},	{"C","43478"}
		}
	),
    ToDate = Table.TransformColumns
    (
        Source,
        {
            {
                "Date",
                each Date.From(Number.From(_)),
                type date
            }
        }
    ),
    Group = Table.Group(ToDate, {"Project"}, {{"Min", each List.Min([Date]), type date}, {"Max", each List.Max([Date]), type date}})
in
	Group

    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

3 Replies

    • Jimmy801's avatar
      Jimmy801
      Icon for Community Champion rankCommunity Champion
      6 years ago

      Hello Anonymous ,

       

      Use Table.Group for this and select Min and Max for the Date-column .

      Here a code example

      let
	Source = #table
	(
		{"Project","Date"},
		{
			{"A","43466"},	{"A","43467"},	{"A","43468"},	{"A","43469"},	{"B","43470"},	{"B","43471"},	{"B","43472"},	{"B","43473"},	{"B","43474"},	{"C","43475"},	
			{"C","43476"},	{"C","43477"},	{"C","43478"}
		}
	),
    ToDate = Table.TransformColumns
    (
        Source,
        {
            {
                "Date",
                each Date.From(Number.From(_)),
                type date
            }
        }
    ),
    Group = Table.Group(ToDate, {"Project"}, {{"Min", each List.Min([Date]), type date}, {"Max", each List.Max([Date]), type date}})
in
	Group

      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

      • Anonymous's avatar
        Anonymous
        Not applicable
        6 years ago

        thank you so much, made my day!!!