[文件操作] 求助，文件通过修改日期判断新旧的批处理该怎么写

@echo off
set "D1=11"
set "D2=22"
pushd %D1%
for /f "delims=" %%a in ('dir /b /a-d') do (
	if exist "..\%D2%\%%a" for %%b in ("..\%D2%\%%a") do (
		rem 测试无误后，删除两个 echo 即为执行删除旧文件和同日期的多余文件
		if "%%~ta" geq "%%~tb" (echo del/q ..\%D2%\%%a) else echo del/q %%a)
)
popd&pause&exit/b
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/XO :: 排除较旧的文件。
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robocopy "d:\a" "d:\b" /mov /xo
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@echo off &setlocal
set "d1=d:\abc"
set "d2=d:\xyz"
for /f %%n in ('dir /b/a-d "%d1%"^|find /c /v "" ') do set "n1=%%n"
for /f %%n in ('dir /b/a-d "%d2%"^|find /c /v "" ') do set "n2=%%n"
if %n1% gtr %n2% set "d1=%d2%" &set "d2=%d1%"
for %%a in ("%d1%\*") do if exist "%d2%\%%~nxa" for /f "delims=" %%b in ("%d2%\%%~nxa") do if "%%~ta" lss "%%~tb" (echo,删除同名旧版本》"%%~a"&del/q "%%~a") else (echo,删除同名旧版本》"%%~b"&del/q "%%~b")
endlocal&pause&exit/b
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set "D1=.\11"
for /f "delims=" %%a in ('dir /b /a-d "%D1%"') do (
	echo %%~ta
)
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