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

Enhance your career with this limited time 50% discount on Fabric and Power BI exams. Ends August 31st. Request your voucher.

Reply
Mquallet
New Member

Set Value of Column B based on Value in Column A

Two columns, A and B in same table.
A has names of classes in it.  B is their category
If colA contains certain words = '*open chat*' id like to set colB to 'Chat", else leave it alone.

 

Simplest manner to accomplish this?

1 ACCEPTED SOLUTION
v-yanjiang-msft
Community Support
Community Support

Hi @Mquallet ,

According to your description, here's my solution.

#"Transform"=Table.ReplaceValue(#"Changed Type",each[ColumnB],each if Text.Contains([ColumnA],"*open chat*") then "Chat" else[ColumnB],Replacer.ReplaceValue,{"ColumnB"})

I create a sample and get the correct result:

vkalyjmsft_0-1669355532328.png

Here's the whole M syntax, you can copy-paste it in a blank query to see the details.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W0sovSM1TSM5ILNFS0lFyU4rViVZyBrLcwSwXIMsDzHJFVeilFBsLAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ColumnA = _t, ColumnB = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ColumnA", type text}, {"ColumnB", type text}}),
    #"Transform"=Table.ReplaceValue(#"Changed Type",each[ColumnB],each if Text.Contains([ColumnA],"*open chat*") then "Chat" else[ColumnB],Replacer.ReplaceValue,{"ColumnB"})
in
    #"Transform"

I attach my sample below for your reference.

 

Best Regards,
Community Support Team _ kalyj

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

View solution in original post

2 REPLIES 2
v-yanjiang-msft
Community Support
Community Support

Hi @Mquallet ,

According to your description, here's my solution.

#"Transform"=Table.ReplaceValue(#"Changed Type",each[ColumnB],each if Text.Contains([ColumnA],"*open chat*") then "Chat" else[ColumnB],Replacer.ReplaceValue,{"ColumnB"})

I create a sample and get the correct result:

vkalyjmsft_0-1669355532328.png

Here's the whole M syntax, you can copy-paste it in a blank query to see the details.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W0sovSM1TSM5ILNFS0lFyU4rViVZyBrLcwSwXIMsDzHJFVeilFBsLAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ColumnA = _t, ColumnB = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ColumnA", type text}, {"ColumnB", type text}}),
    #"Transform"=Table.ReplaceValue(#"Changed Type",each[ColumnB],each if Text.Contains([ColumnA],"*open chat*") then "Chat" else[ColumnB],Replacer.ReplaceValue,{"ColumnB"})
in
    #"Transform"

I attach my sample below for your reference.

 

Best Regards,
Community Support Team _ kalyj

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

wdx223_Daniel
Super User
Super User

NewStep=Table.ReplaceValue(PreviousStepName,"open chat",each [colA],(x,y,z)=>if Text.Contains(z,y) then "Chat" else x,{"colB"})

Helpful resources

Announcements
July PBI25 Carousel

Power BI Monthly Update - July 2025

Check out the July 2025 Power BI update to learn about new features.

Join our Fabric User Panel

Join our Fabric User Panel

This is your chance to engage directly with the engineering team behind Fabric and Power BI. Share your experiences and shape the future.

June 2025 community update carousel

Fabric Community Update - June 2025

Find out what's new and trending in the Fabric community.