Forum Discussion

Anonymous's avatar
Anonymous
Not applicable
6 years ago
Solved

Replacing null values with values from another column

Hi, 

 

I'm wondering where I'm going wrong with this formula. The goal is to replace the null values in "Description.2.2" with the values in "Description.1". I'm getting no errors with this formula, but it doesn't do anything at all. I've tried putting "null" in quotes, as well as without. It makes no difference.

 

What am I missing here?

 

= Table.ReplaceValue(#"Added Prefix","null", each _[Description.2.2],Replacer.ReplaceText,{"Description.1"})

Need Help
  • v-juanli-msft's avatar
    v-juanli-msft
    6 years ago

    Hi Anonymous 

    use the following queries

    let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUTIyVorViVZKBDLBDGMYowzIKCpRio0FAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Description.1 = _t, Description.2.2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Description.1", type text}, {"Description.2.2", type text}}),
    #"Replaced Value" = Table.ReplaceValue(#"Changed Type","",each _[Description.1],Replacer.ReplaceValue,{"Description.2.2"})
in
    #"Replaced Value"

     
    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.

3 Replies

  • v-juanli-msft's avatar
    v-juanli-msft
    Community Support
    6 years ago

    Hi Anonymous 

    use the following queries

    let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUTIyVorViVZKBDLBDGMYowzIKCpRio0FAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Description.1 = _t, Description.2.2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Description.1", type text}, {"Description.2.2", type text}}),
    #"Replaced Value" = Table.ReplaceValue(#"Changed Type","",each _[Description.1],Replacer.ReplaceValue,{"Description.2.2"})
in
    #"Replaced Value"

     
    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.
  • Anonymous's avatar
    Anonymous
    Not applicable
    6 years ago

    Create a new conditional column and populate values from both columns based on condition.

     

    = Table.AddColumn(#"Changed Type", "Description 3", each if [Description 2] = null then [Description 1] else [Description 2])

  • jthomson's avatar
    jthomson
    Solution Sage
    6 years ago

    Easiest just to make a new column using similar conditional logic, rather than amending an existing one