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windows - Batch Script: Concatenating multiple files in multiple folders into one file

I have about 20 folders and all of them have around 100 csv files each. I want to combine all of them together into one file. How should I do this? I know about copy command to combine files of one folder. If I do that, I get 20 files in 20 folders. To combine them, how will I traverse in each folder and do ?


I am trying to write a batch script like this:


FOR /D /R %G in ("*") DO (
cd %G 
COPY *.csv new.csv )

But, it is not working correctly. Any suggestions?

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