Forum Discussion
Retain file name column when using Folder as a data source - Power Query M
Actually, it's pretty easy with this line of code:
= Table.AddColumn(Source, "Custom", each Table.PromoteHeaders(Csv.Document([Content],[Delimiter=";", Encoding=1252])))
Replace your Step 2&3 with it.
It will retain all the metadata from the 1st step and add the content in an additional custom column.
If your csv's have all the same headers, you simply expand this column and the headers of the 1st file will be shown - and expand all other files on these cols as well.
If there are differnt cols - just come back & I'll post the code for the auto-expand of different headers.
Hey Imke!
Thanks for all the support.
I have a slighly different problem and since I'm new to M I don't know how to proceed.
In my case, I need to keep the creation date of the document, as I may benefit from it for some calculations.
How can I transform the creation date into a new column in Power Querry?
Thanks
The column should be/stay there, if you don't use Combine Binaries but use the method I've described and add a column to retrieve the data from the "Content"-column.
Hi ImkeF,
I am doing something a little bit different and was wondering if you could help guide me in my use case. I have a SharePoint folder where different CSVs will be uploaded with different headers. Each csv will have at least one of the common merge headers, so there will always be "Key1", "Key2", or "Key3" as one of the headers - the rest might have extra data. I am trying to modify my power query to handle these cases, so that if the file only has "Key2" - just that column will be read in and the rest ignored. Or if it just has "Key1" and "Key2" - those will be read and the rest ignored.. etc
I created a sample file with 3 columns for the 3 keys for my default file, but I need help modifying my query because right now the new files just read the first 3 columns of data and doesn't search for "Key2" in the data. Any help on this use case?
Thanks in advance for the help!
You have to select the 3 columns in your function before you expand. Therefore you have to modify the Table.SelectColumns-command to cater for missing columns:
Table.SelectColumns(AppendToSource,{"Key1", "Key2", "Key3"}, MissingField.Ignore)That way, any of the 3 key-columns will be selected and no error will be thrown if one or more of them are missing.