Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Find everything you need to get certified on Fabric—skills challenges, live sessions, exam prep, role guidance, and more. Get started

Reply
Mohan128256
Helper III
Helper III

Replace multiple DATE columns values with null based on a condition

Hello All,

 

I have data as below where i am trying to repalce multiple(almost 40 columns) date columns values with nulls where the dates are 1900-01-01 and 2000-01-01 else it should return the dates.

Mohan128256_0-1683905720026.png

I have tried the below power query but not successful.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUTK0NDDQNTAEIiAnEIgNlGJ1opWcgCwjAySpcJBasJQzWMoQKGWsa2QM5LjCpVzAUkbGuoa6qMY5QiSAZpnoGpiiGIdhkytEVywA", 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 date}, {"Column3", type text}, {"Column4", Int64.Type}}),
    #"Duplicated Column" = Table.DuplicateColumn(#"Changed Type", "Column2", "Column5"),
    Custom3 = List.Accumulate( {"Column2","Column5"}, #"Duplicated Column", (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} ))
in
    Custom3

 

It returning as below which is not right.

Mohan128256_1-1683905867543.png

Anyone please correct what i am doing wrong here.

Thanks,

Mohan V.

 

1 ACCEPTED SOLUTION
ThxAlot
Super User
Super User

Simple enough, no need to specify any column name.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("bY4xCoAwDEXvkrmBpNXBsWoP4ORQev9r+FMhtiAkw3888lMrZQqkmwiLYhAurMywhUo7UJTBu82ZoXlHRwqUOCaE4p5D886OYmLlsdWROfkFuL2wrFOnw9/fil/7fmsP", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t, Column3 = _t, Column4 = _t, Column5 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}, {"Column2", type date}, {"Column3", type text}, {"Column4", Int64.Type}, {"Column5", type date}}),

    #"Replaced Value" = Table.ReplaceValue(#"Changed Type",null,null,(x,y,z) => if List.Contains({#date(1900,1,1),#date(2000,1,1)},x) then null else x,Table.ColumnNames(Source))
in
    #"Replaced Value"

ThxAlot_0-1683940063931.png



Expertise = List.Accumulate(


        {Days as from Today},


        {Skills and Knowledge},


        (Current, Everyday) => Current & Day.LeanAndPractise(Everyday)


)



View solution in original post

4 REPLIES 4
ThxAlot
Super User
Super User

Simple enough, no need to specify any column name.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("bY4xCoAwDEXvkrmBpNXBsWoP4ORQev9r+FMhtiAkw3888lMrZQqkmwiLYhAurMywhUo7UJTBu82ZoXlHRwqUOCaE4p5D886OYmLlsdWROfkFuL2wrFOnw9/fil/7fmsP", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t, Column2 = _t, Column3 = _t, Column4 = _t, Column5 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}, {"Column2", type date}, {"Column3", type text}, {"Column4", Int64.Type}, {"Column5", type date}}),

    #"Replaced Value" = Table.ReplaceValue(#"Changed Type",null,null,(x,y,z) => if List.Contains({#date(1900,1,1),#date(2000,1,1)},x) then null else x,Table.ColumnNames(Source))
in
    #"Replaced Value"

ThxAlot_0-1683940063931.png



Expertise = List.Accumulate(


        {Days as from Today},


        {Skills and Knowledge},


        (Current, Everyday) => Current & Day.LeanAndPractise(Everyday)


)



m_dekorte
Super User
Super User

Hi @Mohan128256 

 

Give this a go.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUTK0NDDQNTAEIiAnEIgNlGJ1opWcgCwjAySpcJBasJQzWMoQKGWsa2QM5LjCpVzAUkbGuoa6qMY5QiSAZpnoGpiiGIdhkytEVywA", 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 date}, {"Column3", type text}, {"Column4", Int64.Type}}),
    #"Duplicated Column" = Table.DuplicateColumn(#"Changed Type", "Column2", "Column5"),
    Custom3 = List.Accumulate( {"Column2","Column5"}, #"Duplicated Column", (s,a)=> Table.ReplaceValue( s, each Record.Field( _, a), each if Text.From( Record.Field( _, a)) = "1-1-1900" then null else if Text.From( Record.Field( _, a)) = "1-1-2000" then null else Record.Field( _, a), Replacer.ReplaceValue, {a} ))
in
    Custom3

 

with this result

m_dekorte_0-1683916435957.png

 

Ps. If this helps solve your query please mark this post as Solution, thanks!

@m_dekorte  thanks for the reply. I really appreciate your time.

I tried what you have given but i dont see any changes from my end.

Mohan128256_0-1683919283025.png

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUTK0NDDQNTAEIiAnEIgNlGJ1opWcgCwjAySpcJBasJQzWMoQKGWsa2QM5LjCpVzAUkbGuoa6qMY5QiSAZpnoGpiiGIdhkytEVywA", 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 date}, {"Column3", type text}, {"Column4", Int64.Type}}),
    #"Duplicated Column" = Table.DuplicateColumn(#"Changed Type", "Column2", "Column5"),
    Custom3 = List.Accumulate( {"Column2","Column5"}, #"Duplicated Column", (s,a)=> Table.ReplaceValue( s, each Record.Field( _, a), each if Text.From( Record.Field( _, a)) = "1-1-1900" then null else if Text.From( Record.Field( _, a)) = "1-1-2000" then null else Record.Field( _, a), Replacer.ReplaceValue, {a} ))
in
    Custom3

Am i Missing anything here.

 

Please correct.

Hi @Mohan128256,

 

Works on my end, most likely a system- or regional setting... try this instead.

 

List.Accumulate( {"Column2","Column5"}, #"Duplicated Column",
    (s,a)=> Table.ReplaceValue( s, each Record.Field( _, a),
        each if Date.From( Record.Field( _, a)) = #date(1900, 1, 1) then null
        else if Date.From( Record.Field( _, a)) = #date(2000, 1, 1) then null
        else Date.From( Record.Field( _, a)), Replacer.ReplaceValue, {a} ))

 

Ps. If this helps solve your query please mark this post as Solution, thanks!

Helpful resources

Announcements
Europe Fabric Conference

Europe’s largest Microsoft Fabric Community Conference

Join the community in Stockholm for expert Microsoft Fabric learning including a very exciting keynote from Arun Ulag, Corporate Vice President, Azure Data.

Power BI Carousel June 2024

Power BI Monthly Update - June 2024

Check out the June 2024 Power BI update to learn about new features.

PBI_Carousel_NL_June

Fabric Community Update - June 2024

Get the latest Fabric updates from Build 2024, key Skills Challenge voucher deadlines, top blogs, forum posts, and product ideas.

Top Solution Authors
Top Kudoed Authors