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Syndicate_Admin's avatar
Syndicate_Admin
Administrator
4 years ago
Solved

URGENT! Add rows with missing dates in Power Query

Good morning, I need to add the missing dates to the list of dates declared in various files. In power query I have this info: I need to add the rows of the missing dates, and that the value...
  • v-easonf-msft's avatar
    v-easonf-msft
    4 years ago

    Hi, Syndicate_Admin 

    Please try follow steps:

    1. group all rows by column ’DeclarationDate‘

    2. Inset a step after step 'Grouped Rows' as below to get the list of missing date

    = Table.RenameColumns(Table.FromList(List.Difference(List.Dates(List.Min(#"Grouped Rows"[DeclarationDate]),Duration.TotalDays(List.Max(#"Grouped Rows"[DeclarationDate])-List.Min(#"Grouped Rows"[DeclarationDate])), #duration(1,0,0,0) ), #"Grouped Rows"[DeclarationDate]), Splitter.SplitByNothing(),null, null, ExtraValues.Error), {{"Column1", "DeclarationDate"}})

    3.Concatenate rows from the tables generated in the previous two steps

    = Table.Combine({#"Grouped Rows", ListMissingDates})

    4.sort the new table

    5.fill down the column value

    6. expand the column you need

    result：

    Please check my sample for more details.

    Similar thread:

    How to fill in missing data values in timeseries by linear interpolation 

    Best Regards,
    Community Support Team _ Eason
    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

ryan_leggett's avatar
ryan_leggett
New Member
2 years ago

I have almost exactly the same question, except my data also includes different equipment, and each equipment is missing dates. I've followed these steps after "grouping" by the equipment, for one equipment table only, but now I want to expand the solution for multiple equipment. Any tips for how to do that??

 

Thanks!