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DimasArend
New Member

Power Query: Latest date based on a condition

Hi,

 

I am struggling to solve a problem in Power Query. Could someone help me?

 

My table look like this:

DATEXXX
05/01/2021102
04/01/2021

115

04/01/2021102
03/01/2021102
01/01/2021115

 

And i need that return this: The lastest date of xxx if they are in a sequence

DATEXXX
05/01/2021102
04/01/2021

115

01/01/2021115

 

Thanks in advance.

1 ACCEPTED SOLUTION
Payeras_BI
Super User
Super User

Hi @DimasArend,

This is what I understood, let's see if I got it right.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjDVNzDUNzIwMlTSUTI0MFKK1QEKmiALGppiEYSpNMYmaIiuPRYA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [DATE = _t, XXX = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"DATE", type date}, {"XXX", Int64.Type}}),
    #"Sorted Rows" = Table.Sort(#"Changed Type",{{"XXX", Order.Ascending}, {"DATE", Order.Ascending}}),
    AddedIndex = Table.AddIndexColumn(#"Sorted Rows", "Index", 0, 1, Int64.Type),
    #"Added Custom" = Table.AddColumn(AddedIndex, "Custom", each let 
     Check1 = try Duration.Days(AddedIndex[DATE]{[Index]} - AddedIndex[DATE]{[Index]-1}) otherwise 0,
     Check2 = try AddedIndex[XXX]{[Index]} = AddedIndex[XXX]{[Index]-1} otherwise false
     in 
     if Check1 = 1 and Check2 = true then null else [DATE], type date),
    #"Filled Down" = Table.FillDown(#"Added Custom",{"Custom"}),
    #"Grouped Rows" = Table.Group(#"Filled Down", {"XXX", "Custom"}, {{"DATE", each List.Max([DATE]), type nullable date}}),
    #"Removed Other Columns" = Table.SelectColumns(#"Grouped Rows",{"DATE", "XXX"}),
    #"Sorted Rows1" = Table.Sort(#"Removed Other Columns",{{"DATE", Order.Descending}})
in
    #"Sorted Rows1"

 

If this post answered your question, please mark it as a solution to help other users find useful content.
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J. Payeras
Mallorca, Spain

View solution in original post

2 REPLIES 2
Payeras_BI
Super User
Super User

Hi @DimasArend,

This is what I understood, let's see if I got it right.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjDVNzDUNzIwMlTSUTI0MFKK1QEKmiALGppiEYSpNMYmaIiuPRYA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [DATE = _t, XXX = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"DATE", type date}, {"XXX", Int64.Type}}),
    #"Sorted Rows" = Table.Sort(#"Changed Type",{{"XXX", Order.Ascending}, {"DATE", Order.Ascending}}),
    AddedIndex = Table.AddIndexColumn(#"Sorted Rows", "Index", 0, 1, Int64.Type),
    #"Added Custom" = Table.AddColumn(AddedIndex, "Custom", each let 
     Check1 = try Duration.Days(AddedIndex[DATE]{[Index]} - AddedIndex[DATE]{[Index]-1}) otherwise 0,
     Check2 = try AddedIndex[XXX]{[Index]} = AddedIndex[XXX]{[Index]-1} otherwise false
     in 
     if Check1 = 1 and Check2 = true then null else [DATE], type date),
    #"Filled Down" = Table.FillDown(#"Added Custom",{"Custom"}),
    #"Grouped Rows" = Table.Group(#"Filled Down", {"XXX", "Custom"}, {{"DATE", each List.Max([DATE]), type nullable date}}),
    #"Removed Other Columns" = Table.SelectColumns(#"Grouped Rows",{"DATE", "XXX"}),
    #"Sorted Rows1" = Table.Sort(#"Removed Other Columns",{{"DATE", Order.Descending}})
in
    #"Sorted Rows1"

 

If this post answered your question, please mark it as a solution to help other users find useful content.
Kudos are another nice way to acknowledge those who tried to help you.

J. Payeras
Mallorca, Spain

View solution in original post

KNP
Super User
Super User

I don't fully understand what you're trying to get to.

Why is 115 in your result twice and 102 not?

Have I solved your problem?
Please click Accept as Solution so I don't keep coming back to this post, oh yeah, others may find it useful also ;).
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