Merging Text files in Different Folders in a Parent folder - cmd

Question

I have 50 sub-Folders inside a Single Parent Folder.
Inside each sub folders there are multiple .txt files. I want to merge all the text files in a single sub-folder into 1 .txt file.
But I want a command so that it can be done in one go for all the subfolder, like i don't want to write command for each sub-folder.
For example:-
ABCD (Parent Folder ):-
A
B ; Here A and B are sub-folder
A\0001.txt
A\0002.txt
I want to merge and make a single text file A\0001.txt.
B\0001.txt
B\0002.txt
I want to merge both the text files in B Folder.
Can it be done in one go ?

Answer 1

This is probably a lot easier using powershell.
Try the following and change the basedir to the parent folder of all your subdirectories.
$basedir = "C:\Basedir"
$folderlist = Get-childitem -Path $basedir
foreach ($folder in $folderlist)
{
$dir = $folder
$outFile = Join-Path $dir "merged.txt"
# Build the file list
$fileList = Get-ChildItem -Path $dir -Filter File*.txt -File
# Get the header info from the first file
Get-Content $fileList[0] | select -First 2 | Out-File -FilePath $outfile -Encoding ascii
# Cycle through and get the data (sans header) from all the files in the list
foreach ($file in $filelist)
{
Get-Content $file | select -Skip 2 | Out-File -FilePath $outfile -Encoding ascii -Append
}
}

Answer 2

Maybe old but useful: this version works with folders and subfolders recursively:
$basedir = "..."
$folderlist = Get-childitem -Path $basedir -Recurse -Directory | Select-Object FullName
foreach ($folder in $folderlist)
{
Write-Host $folder.FullName
$dir = $folder.FullName
$outFile = Join-Path $basedir "merged.txt"
# Build the file list
$fileList = Get-ChildItem -Path $dir -Filter *.log | Select-Object FullName
# Get the header info from the first file
#Get-Content $fileList[0] | select -First 2 | Out-File -FilePath $outfile -Encoding ascii
# Cycle through and get the data (sans header) from all the files in the list
foreach ($file in $filelist)
{
Write-Host $file.FullName
Get-Content $file.FullName | Out-File -FilePath $outfile -Encoding ascii -Append
}
}