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DebbieE's avatar
DebbieE
Community Champion
3 years ago

Power Query Editor Transform file helper Query folders

I have lots of files I have created from folders and now I have lots of these cluttering up power Query Editor I really dont like it. Is there any way I can actually get rid of all these and...
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DebbieE's avatar
DebbieE
Community Champion
3 years ago

Oh my word. im just as confused now. they are in sharepoint but I have used Folder to get the data in

 

Ive tried going through this list but Im struggling . I just clicked Binary on a file and it just shows this. 

I guessed next to click the arrows on Table

But it hasnt brought through the file name. Which I really need and happened when I just used Folder. 

 

"and extract the transform step as a function

- remove the steps for the single file

- add a column that calls the function for each of the files

- expand that column

- apply column type changes as needed"

 

And this section, I havent got a clue what to do here..

 

 

This is the Advanced Editor Code from the original Get Data Folder that uses these helper files

 

let
Source = Folder.Files("C:\Users\Me\tenant\Project\Data"),
#"Filtered Rows" = Table.SelectRows(Source, each Text.Contains([Name], "Metric")),
#"Filtered Hidden Files1" = Table.SelectRows(#"Filtered Rows", each [Attributes]?[Hidden]? <> true),
#"Invoke Custom Function1" = Table.AddColumn(#"Filtered Hidden Files1", "Transform File (11)", each #"Transform File (11)"([Content])),
#"Renamed Columns1" = Table.RenameColumns(#"Invoke Custom Function1", {"Name", "Source.Name"}),
#"Removed Other Columns1" = Table.SelectColumns(#"Renamed Columns1", {"Source.Name", "Transform File (11)"}),
#"Expanded Table Column1" = Table.ExpandTableColumn(#"Removed Other Columns1", "Transform File (11)", Table.ColumnNames(#"Transform File (11)"(#"Sample File (11)"))),

lbendlin's avatar
lbendlin
Super User
3 years ago

 

Folder listing:

Let's collect all ExecutionAggregation files

Click the first Binary link. That ingests the CSV and already promotes the headers

We can simplify this to 

Table.PromoteHeaders(Csv.Document(Binary), [PromoteAllScalars=true])

and stuff that into a function.

 

 

let
    Source = Folder.Files(Folder),
    #"Filtered Rows" = Table.SelectRows(Source, each Text.Contains([Name], "ExecutionAggregation")),
    Ingest = (Binary)=> Table.PromoteHeaders(Csv.Document(Binary), [PromoteAllScalars=true])
in
    #"Filtered Rows"

 

Now we add a custom column that ingests each file

 

 

let
    Source = Folder.Files(Folder),
    #"Filtered Rows" = Table.SelectRows(Source, each Text.Contains([Name], "ExecutionAggregation")),
    Ingest = (Binary)=> Table.PromoteHeaders(Csv.Document(Binary), [PromoteAllScalars=true]),
    #"Added Custom" = Table.AddColumn(#"Filtered Rows", "Custom", each Ingest([Content]))
in
    #"Added Custom"

 

Then we can throw away all the meta data columns we don't need any more

 

And lastly we expand the Custom column to append all file contents.

 

That's it. Here is the entire code:

 

let
    Source = Folder.Files(Folder),
    #"Filtered Rows" = Table.SelectRows(Source, each Text.Contains([Name], "ExecutionAggregation")),
    Ingest = (Binary)=> Table.PromoteHeaders(Csv.Document(Binary), [PromoteAllScalars=true]),
    #"Added Custom" = Table.AddColumn(#"Filtered Rows", "Custom", each Ingest([Content])),
    #"Removed Other Columns" = Table.SelectColumns(#"Added Custom",{"Name", "Custom"}),
    #"Expanded Custom" = Table.ExpandTableColumn(#"Removed Other Columns", "Custom", {"GatewayObjectId", "AggregationStartTimeUTC", "AggregationEndTimeUTC", "DataSource", "Success", "AverageQueryExecutionDuration(ms)", "MaxQueryExecutionDuration(ms)", "MinQueryExecutionDuration(ms)", "QueryType", "AverageDataProcessingDuration(ms)", "MaxDataProcessingDuration(ms)", "MinDataProcessingDuration(ms)", "Count"})
in
    #"Expanded Custom"