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LesG01stn's avatar
LesG01stn
Frequent Visitor
4 years ago
Solved

Lookup values between two tables

I have 2 tables. The first table called OrderHeader has a field called ErrorDescription which has very verbose strings. The second table called ErrorLookup has a field called LookFor and a second field called FaultType.

 

I want to created a custom column in the first table and call it Fault. This column must look up the string from the second table (LookFor) and return FaultType into the new Fault column.

 

I have gone through many suggestions in this forumn but cannot get any of them to work.

OrderHeader table:

ErrorLookUp table:

Any help will be appreciated! 

Need Help
  • v-kkf-msft's avatar
    v-kkf-msft
    4 years ago

    Hi LesG01stn ,

     

    If the '*' character is not removed, it will look for the text "*API failed*" instead of "API failed". 

    I found a wrong column name in the code, please try the following code, it should return the correct value.

     

    let
Source = Excel.Workbook(File.Contents("C:\Users\lesgo\OneDrive - CCBAGROUP\OrderHeader.xlsx"), null, true),
Table1_Table = Source{[Item="Table1",Kind="Table"]}[Data],
#"Changed Type" = Table.TransformColumnTypes(Table1_Table,{{"(Do Not Modify) Order", type text}, {"(Do Not Modify) Row Checksum", type text}, {"(Do Not Modify) Modified On", type datetime}, {"Account Number (Customer) (Account)", Int64.Type}, {"Customer", type text}, {"Order Category", type text}, {"Sales Order Number", Int64.Type}, {"Source Channel", type text}, {"Created On", type datetime}, {"Requested Delivery Date", type datetime}, {"Planned Delivery Date", type date}, {"Total Amount", type number}, {"Order Quantity (Cases)", Int64.Type}, {"Created By", type text}, {"Status", type text}, {"Status Reason", type text}, {"Submission Status", type text}, {"Validation Outcome", type text}, {"Error Description", type text}, {"Integration Error", type text}, {"Delivery Location", type text}, {"Operational Site", type text}, {"Full Name (Account Manager) (Worker)", type text}, {"Sales Office (Customer) (Account)", type text}}),
#"Removed Columns" = Table.RemoveColumns(#"Changed Type",{"(Do Not Modify) Order", "(Do Not Modify) Row Checksum", "(Do Not Modify) Modified On"}),
varErrorMap = Table.Buffer ( ErrorLookUp ),
varLookFor = List.Buffer ( List.Transform ( varErrorMap[LookFor], each Text.Lower ( Text.Replace ( _, "*", "") ) ) ),
AddList = Table.AddColumn(#"Removed Columns", "Fault" as text, (t) => let
i = List.PositionOf ( varLookFor, List.First ( List.Select ( varLookFor, each Text.Contains ( Text.Lower ( t[Error Description] ), _ ) ) ) )
in try varErrorMap[FaultType]{i} otherwise null
)

in
AddList

     

    If the problem is still not resolved, please provide detailed error information or the expected result you expect. Let me know immediately, looking forward to your reply.
    Best Regards,
    Winniz
    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

14 Replies

  • jennratten's avatar
    jennratten
    Super User
    4 years ago

    Hello - I was able to do it like this:

     

    let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("HcyxDgIhEEXRX3mhNmZjYWG7xsTCWGiHFMiOMhGYDczq74vWJ/daaw63ZRg22zPGShMrxkjhhQvVNwfC6FPCw3OiaYdrJMhM1StLQfQNypkmyKLGraw5cWtcnvAIUtQHxXH/hx5WArcuc5V7oowPa4SUPqzI8lOl3NbGuS8=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ErrorDescription = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ErrorDescription", type text}}),
    varErrorMap = Table.Buffer ( LookFor ),
    varLookFor = List.Buffer ( List.Transform ( varErrorMap[LookFor], each Text.Lower ( Text.Replace ( _, "*", "") ) ) ),
    AddList = Table.AddColumn ( #"Changed Type", "Fault", (t) => 
        let 
            i = List.PositionOf ( varLookFor, List.First ( List.Select ( varLookFor, each Text.Contains ( Text.Lower ( t[ErrorDescription] ), _ ) ) ) )
        in varErrorMap[FaultType]{i}, type text
        )

in
    AddList

     

     

     

    • LesG01stn's avatar
      LesG01stn
      Frequent Visitor
      4 years ago

      I went into the form, selected Modelling > Write DAX expression that creates a new column and pasted your code

      let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("HcyxDgIhEEXRX3mhNmZjYWG7xsTCWGiHFMiOMhGYDczq74vWJ/daaw63ZRg22zPGShMrxkjhhQvVNwfC6FPCw3OiaYdrJMhM1StLQfQNypkmyKLGraw5cWtcnvAIUtQHxXH/hx5WArcuc5V7oowPa4SUPqzI8lOl3NbGuS8=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ErrorDescription = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ErrorDescription", type text}}),
    varErrorMap = Table.Buffer ( LookFor ),
    varLookFor = List.Buffer ( List.Transform ( varErrorMap[LookFor], each Text.Lower ( Text.Replace ( _, "*", "") ) ) ),
    AddList = Table.AddColumn ( #"Changed Type", "Fault", (t) => 
        let 
            i = List.PositionOf ( varLookFor, List.First ( List.Select ( varLookFor, each Text.Contains ( Text.Lower ( t[ErrorDescription] ), _ ) ) ) )
        in varErrorMap[FaultType]{i}, type text
        )

in
    AddList

      but I get the following error

       

      • jennratten's avatar
        jennratten
        Super User
        4 years ago

        Hi - you will need to add this in Power Query, not DAX.  Can you please go to the Power Query editor, go to the OrderHeader table then click Advanced Editor on the ribbon, take a screen snip of what you see and post it here?  If it is long I only need the last couple of lines.  Then I can let you know exactly how to integrate this solution with your script.

  • jennratten's avatar
    jennratten
    Super User
    4 years ago

    Hello - you would use this in Power Query, not DAX.  Open the Power Query editor and go to the Order Header table.  Click Advanced Editor on the ribbon.  Can you take a screenship of what you see and paste it here?  If it's long I only need the last couple of lines.  Then I will let you know how to incorporate the script that I sent into the Advanced Editor from there.

    • LesG01stn's avatar
      LesG01stn
      Frequent Visitor
      4 years ago

      Thanks so much... I am new and trying to teach myself

      let
      Source = Excel.Workbook(File.Contents("C:\Users\lesgo\Downloads\Order errors.xlsx"), null, true),
      Table1_Table = Source{[Item="Table1",Kind="Table"]}[Data],
      #"Changed Type" = Table.TransformColumnTypes(Table1_Table,{{"Customer", type text}, {"AccountNumber", Int64.Type}, {"OrderCategory", type text}, {"SalesOrderNumber", Int64.Type}, {"SourceChannel", type text}, {"CreatedOn", type datetime}, {"RequestedDeliveryDate", type datetime}, {"PlannedDeliveryDate", type date}, {"TotalAmount", type number}, {"OrderQuantity(Cases)", Int64.Type}, {"CreatedBy", type text}, {"Status", type text}, {"StatusReason", type text}, {"SubmissionStatus", type text}, {"ValidationOutcome", type text}, {"ErrorDescription", type text}, {"IntegrationError", type text}, {"DeliveryLocation", type any}}),
      #"Filtered Rows" = Table.SelectRows(#"Changed Type", each ([ErrorDescription] <> null)),
      #"Renamed Columns" = Table.RenameColumns(#"Filtered Rows",{{"OrderQuantity(Cases)", "OrderQuantity"}})
      in
      #"Renamed Columns"

      • jennratten's avatar
        jennratten
        Super User
        4 years ago

        You are very welcome.  That's how a lot of us learned.  🙂

        Here is the new script.  Note, the last step of your script (before the in) was #"Renamed Columns".  I added a comma to the end of that line, then added the new steps required.

        To use this new script, go back to the Advanced Editor for the OrderHeader table and replace the entire contents with the new script below.

        let
Source = Excel.Workbook(File.Contents("C:\Users\lesgo\Downloads\Order errors.xlsx"), null, true),
Table1_Table = Source{[Item="Table1",Kind="Table"]}[Data],
#"Changed Type" = Table.TransformColumnTypes(Table1_Table,{{"Customer", type text}, {"AccountNumber", Int64.Type}, {"OrderCategory", type text}, {"SalesOrderNumber", Int64.Type}, {"SourceChannel", type text}, {"CreatedOn", type datetime}, {"RequestedDeliveryDate", type datetime}, {"PlannedDeliveryDate", type date}, {"TotalAmount", type number}, {"OrderQuantity(Cases)", Int64.Type}, {"CreatedBy", type text}, {"Status", type text}, {"StatusReason", type text}, {"SubmissionStatus", type text}, {"ValidationOutcome", type text}, {"ErrorDescription", type text}, {"IntegrationError", type text}, {"DeliveryLocation", type any}}),
#"Filtered Rows" = Table.SelectRows(#"Changed Type", each ([ErrorDescription] <> null)),
#"Renamed Columns" = Table.RenameColumns(#"Filtered Rows",{{"OrderQuantity(Cases)", "OrderQuantity"}}),
    varErrorMap = Table.Buffer ( LookFor ),
    varLookFor = List.Buffer ( List.Transform ( varErrorMap[LookFor], each Text.Lower ( Text.Replace ( _, "*", "") ) ) ),
    AddList = Table.AddColumn ( #"Renamed Columns", "Fault", (t) => 
        let 
            i = List.PositionOf ( varLookFor, List.First ( List.Select ( varLookFor, each Text.Contains ( Text.Lower ( t[ErrorDescription] ), _ ) ) ) )
        in varErrorMap[FaultType]{i}, type text
        )

in
    AddList