Merge CSV files with batch script (must have same columns)

mergeCSV.bat

@echo off

setlocal enabledelayedexpansion
set first=1

set tmpFile=merged.csv.tmp
set outFile=merged.csv

if exist "%tmpFile%" del "%tmpFile%"
if exist "%outFile%" del "%outFile%"

>%tmpFile% (
  for %%F in (*.csv) do (
    if defined first (
      type "%%F"
      set "first="
    ) else more +1 "%%F"
  )
)

ren "%tmpFile%" "%outFile%"