Replace numbers with Text in Power Query

[Mohan128256]

Hi All, I have a sample table data where I am trying to replace 0 with N and 1 with Y using Replacevalue in power query. I cannot add as new custom column because, the same operation i should do on more than 40 columns. Table.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSAeNAIDZQitWJVnICstzdgUQ4EBuChZyBLDc3IOEKF3IBsjw8UDSCjAkJQdHoBBNyhaiKBQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t, Column3 = _t, Column4 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}, {"Column2", type text}, {"Column3", type text}, {"Column4", Int64.Type}}),
    Custom1 = Table.ReplaceValue(#"Changed Type", each [Column3], each if ([Column1]="A" or [Column1]="B") and [Column2]="TT" then "change" else [Column3], Replacer.ReplaceValue, {"Column3"}),
    Custom2 = Table.ReplaceValue(
     Custom1, 
     each [Column4] = 0, 
     each "N", 
     (x,y,z)=> if y then z else x,
     {"Column4"} 
)
in
    Custom2

But i need to replace both 0 with N and 1 with Y in single power query step only.

Can anyone please help me on this.

Thanks,

Mohan V.

[amitchandak]

@Mohan128256 , Check if this code can help

let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUTJQitWJVnICsgzBLGe4mAtELBYA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}, {"Column2", type text}}),
#"Replaced Value" = Table.ReplaceValue(#"Changed Type","0","N",Replacer.ReplaceText,{"Column2"}),
#"Replaced Value1" = Table.ReplaceValue(#"Replaced Value","1","Y",Replacer.ReplaceText,{"Column2"})
in
#"Replaced Value1"

[Mohan128256]

@amitchandak 
like i mentioned, i have more than 40 columns to do the replace values with same.

I found a solution for this as below which works fine for me in a single step

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSAeNAIDZQitWJVnICstzdgUQ4EBuChZyBLDc3IOEKF3IBsjw8UDSCjAkJQdHoBBNyhaiKBQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t, Column3 = _t, Column4 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}, {"Column2", type text}, {"Column3", type text}, {"Column4", Int64.Type}}),
    Custom1 = Table.ReplaceValue(#"Changed Type", each [Column3], each if ([Column1]="A" or [Column1]="B") and [Column2]="TT" then "change" else [Column3], Replacer.ReplaceValue, {"Column3"}),
    #"Duplicated Column" = Table.DuplicateColumn(Custom1, "Column4", "Column5"),
    Custom2 = List.Accumulate( {"Column4", "Column5"}, #"Duplicated Column", (s,a)=> Table.ReplaceValue( s, each Record.Field( _, a), each if Text.From( Record.Field( _, a)) = "0" then "N" else if Text.From( Record.Field( _, a)) = "1" then "Y" else _, Replacer.ReplaceValue, {a} ))
in
    Custom2

but only thing now i need to know how can i do it on date data type columns.

here 1900-01-01 and 2000-01-01 should be replaced as null else return the dates.

I have tried this below but didnt work

    Custom3 = List.Accumulate( {"Column2"}, Custom2, (s,a)=> Table.ReplaceValue( s, each Record.Field( _, a), each if Text.From( Record.Field( _, a)) = "1900-01-01" then null else if Text.From( Record.Field( _, a)) = "2000-01-01" then null else _, Replacer.ReplaceValue, {a} ))

any help.