Forum Discussion
Import all CSV files from folder with different schemas
Hi caninetiger
Currently Power Query doesn't support to create more queries(tables) automatically or dynamically from a table. So this is not possible at present. I read your discussion in another thread about this and you may decide to use a Python script to write them into an Excel Workbook or a database. This seems the best alternative currently.
But I'd like to remind that if these files have too many rows, it may hit the data size limit as you will have 300+ tables in a semantic model. You may refer to Power BI limit for number of tables - Microsoft Fabric Community There is no document to point out that the limit for number of tables in Power BI but there is limit to data size.
Best Regards,
Jing
caninetiger OK, found a similar issue and maybe the technique will work for you.
dynamically import files from a folder WITHOUT com... - Microsoft Fabric Community
Greg_Deckler, please excuse my inexperience but I searched through it and I'm not sure where the solution is.
I see your recommendation at the bottom and I've previously looked into writing a specialized function that perhaps could separate all the files in the folder into separate tables but I'm not familiar enough with the M language to do that. I've gotten only as far as listing all the files as separate tables in Power Query (see pic below), but I wouldn't know what to do next:
caninetiger I would recommend reaching out to the user that originally posted the issue and/or ImkeF
Hi caninetiger
Currently Power Query doesn't support to create more queries(tables) automatically or dynamically from a table. So this is not possible at present. I read your discussion in another thread about this and you may decide to use a Python script to write them into an Excel Workbook or a database. This seems the best alternative currently.
But I'd like to remind that if these files have too many rows, it may hit the data size limit as you will have 300+ tables in a semantic model. You may refer to Power BI limit for number of tables - Microsoft Fabric Community There is no document to point out that the limit for number of tables in Power BI but there is limit to data size.
Best Regards,
JingHere's that Python script if anyone wants to use it:
import pandas as pd import glob from pathlib import Path # path to your folder folder_path = r"C:\Users\YOUR_USER\Downloads\FOLDER_NAME/*.csv" # create an excel file with pd.ExcelWriter("EXCEL_FILE_NAME.xlsx") as writer: # Get paths for every csv file in the folder for file_path in glob.glob(folder_path): # get each file name file_name=Path(file_path).stem # read the file into pandas df = pd.read_csv(file_path) # write the file into the excel file with each csv file becoming it's own sheet df.to_excel(writer, sheet_name=file_name, index=False)Just a heads up about the above code, if any of your csv file names have more than 31 characters, excel will reject it as a sheet name and the code will break.
Best,
Yisroel