Conditional changes to multiple columns at once

[Anonymous]

Hello there.  I'm doing a bit of data cleansing and am hoping for a pointer on the following scenario.

Two columns containing YYYY data with some punctuation (sample below).  Not all entries have data in the second column because not all items span a date range.  

If the YearFrom contains "--" I want to replace those dashes with two zeros, AND populate the YearTo with the last year of the century.  I can work out the century, and I can replace the dashes, but I don't know who to do an if statement that replaces the dashes and fills in the YearTo column.  Any points would be very much appreciated.

YearFrom   YearTo

1985

1939            1942

19--

I would like to get to:

YearFrom  YearTo

1985

1939        1942

1900         1999

[v-juanli-msft · Accepted solution]

Hi @Anonymous 

Add column as below

Write code in Advanced editor

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMrS0MFXSUVKK1QGxjS2BbENLEyMoX1cXLBcLAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [YearFrom = _t, YearTo = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"YearFrom", type text}, {"YearTo", Int64.Type}}),
    #"Added Conditional Column" = Table.AddColumn(#"Changed Type", "flag", each if Text.Contains([YearFrom], "--") then 1 else null),
    #"Replaced Value" = Table.ReplaceValue(#"Added Conditional Column","--","00",Replacer.ReplaceText,{"YearFrom"}),
    #"Added Custom" = Table.AddColumn(#"Replaced Value", "century", each Number.FromText([YearFrom])+100-1),
    #"Added Conditional Column1" = Table.AddColumn(#"Added Custom" , "modified_YearTo", each if [flag] = 1 then [century] else [YearTo])
in
    #"Added Conditional Column1"

Then remove [flag],[century],[YearTo] columns.

Best Regards
Maggie

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