Power Query - Pull Over Latest Date From Another Column

L

lager1001

Board Regular
Joined
May 17, 2019
Messages
88
This would seemingly be simple to do. I have a "Report Date"column with hundreds of rows of dates. I need a custom column that indicates with an "x" or a flag of some type if each row in the Report Date column contains the latest report date within the column itself. Not today's date but the latest date found in the column. I can do this in Excel but run into trouble trying to write it in power query. Any ideas?

[TABLE="width: 266"]
<colgroup><col><col><col></colgroup><tbody>[TR]
[TD]Order[/TD]
[TD]Report Date[/TD]
[TD]Latest Date[/TD]
[/TR]
[TR]
[TD]12123[/TD]
[TD]10/10/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12123[/TD]
[TD]10/11/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12123[/TD]
[TD]10/14/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12123[/TD]
[TD]10/15/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12123[/TD]
[TD]10/17/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12123[/TD]
[TD]10/18/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12123[/TD]
[TD]10/21/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12123[/TD]
[TD]10/22/2019[/TD]
[TD]x[/TD]
[/TR]
[TR]
[TD]12444[/TD]
[TD]10/10/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12444[/TD]
[TD]10/11/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12444[/TD]
[TD]10/14/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12444[/TD]
[TD]10/15/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]12444[/TD]
[TD]10/17/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]15555[/TD]
[TD]10/10/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]15555[/TD]
[TD]10/11/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]15555[/TD]
[TD]10/14/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]32323[/TD]
[TD]10/10/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]32323[/TD]
[TD]10/11/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]32323[/TD]
[TD]10/14/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]32323[/TD]
[TD]10/15/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]32323[/TD]
[TD]10/17/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]32323[/TD]
[TD]10/18/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]32323[/TD]
[TD]10/21/2019[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]32323[/TD]
[TD]10/22/2019[/TD]
[TD]x[/TD]
[/TR]
</tbody>[/TABLE]
 

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you can try with Group and Max from Report Date
or
Table.Max from Report Date

but this is not an Excel worksheet way
 
Last edited:
Upvote 0
is this acceptable?

[Table="width:, class:head"]
[tr=bgcolor:#FFFFFF][td=bgcolor:#70AD47]Order[/td][td=bgcolor:#70AD47]Report Date[/td][td=bgcolor:#70AD47]Latest Date[/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
12123​
[/td][td=bgcolor:#E2EFDA]
10/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
12123​
[/td][td]
11/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
12127​
[/td][td=bgcolor:#E2EFDA]
14/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
12123​
[/td][td]
15/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
12123​
[/td][td=bgcolor:#E2EFDA]
17/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
12123​
[/td][td]
18/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
12123​
[/td][td=bgcolor:#E2EFDA]
21/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
12123​
[/td][td]
22/10/2019​
[/td][td]
22/10/2019​
[/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
12444​
[/td][td=bgcolor:#E2EFDA]
10/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
12444​
[/td][td]
11/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
12444​
[/td][td=bgcolor:#E2EFDA]
14/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
12444​
[/td][td]
15/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
12444​
[/td][td=bgcolor:#E2EFDA]
17/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
15555​
[/td][td]
10/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
15555​
[/td][td=bgcolor:#E2EFDA]
11/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
15555​
[/td][td]
14/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
32323​
[/td][td=bgcolor:#E2EFDA]
10/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
32323​
[/td][td]
11/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
32323​
[/td][td=bgcolor:#E2EFDA]
14/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
32323​
[/td][td]
15/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
32323​
[/td][td=bgcolor:#E2EFDA]
17/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
32323​
[/td][td]
18/10/2019​
[/td][td][/td][/tr]

[tr=bgcolor:#FFFFFF][td=bgcolor:#E2EFDA]
32323​
[/td][td=bgcolor:#E2EFDA]
21/10/2019​
[/td][td=bgcolor:#E2EFDA][/td][/tr]

[tr=bgcolor:#FFFFFF][td]
32323​
[/td][td]
22/10/2019​
[/td][td]
22/10/2019​
[/td][/tr]
[/table]

Code: 
[SIZE=1]// TableMaxDate
let
    Source = Excel.CurrentWorkbook(){[Name="[I][COLOR="#FF0000"]YourTableName[/COLOR][/I]"]}[Content],
    Tmax = Table.PromoteHeaders(Table.SelectColumns(Table.Transpose(Record.ToTable(Table.Max(Source,"Report Date"))),{"Column2"}), [PromoteAllScalars=true]),
    Merge = Table.NestedJoin(Source,{"Report Date"},Table.RenameColumns(Tmax,{{"Report Date", "Latest Date"}}),{"Latest Date"},"Latest Date",JoinKind.LeftOuter),
    Type = Table.TransformColumnTypes(Table.ExpandTableColumn(Merge, "Latest Date", {"Latest Date"}, {"Latest Date"}),{{"Report Date", type date}, {"Latest Date", type date}})
in
    Type[/SIZE]
 
Upvote 0
or even this

Code: 
[SIZE=1]// TableMaxDate
let
    Source = Excel.CurrentWorkbook(){[Name="[I][COLOR="#FF0000"]YourTableName[/COLOR][/I]"]}[Content],
    TMax = Table.PromoteHeaders(Table.SelectColumns(Table.Transpose(Record.ToTable(Table.Max(Source,"Report Date"))),{"Column2"}), [PromoteAllScalars=true]),
    Result = Table.ExpandTableColumn(Table.NestedJoin(Source,{"Report Date"},TMax,{"Report Date"},"Latest Date",JoinKind.LeftOuter), "Latest Date", {"Report Date"}, {"Latest Date"}),
    Type = Table.TransformColumnTypes(Result,{{"Report Date", type date}, {"Latest Date", type date}})
in
    Type[/SIZE]
 
Upvote 0
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