DosTips.com

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@echo off
break>12345678.txt
break>87654321.txt
break>test.txt
break>123456789.txt
echo dir ????????.txt
dir ????????.txt
echo --------------
echo dir "????????.>txt"
dir "????????.>txt"
echo --------------

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dir ????????.txt
17.05.2024  12:19                 0 12345678.txt
17.05.2024  12:19                 0 123456789.txt
17.05.2024  12:19                 0 87654321.txt
17.05.2024  12:19                 0 test.txt
--------------
dir "????????.>txt"
 Directory of c:\temp

File Not Found
--------------

c:\temp>

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for /f "delims=" %%i in ('dir /b "*.txt"') do (
	set "current=%%i"
	if /i "!current:~9!" neq "" (
		echo %%~i
	)
)

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c:\
12345678.txt
123456789.txt
87654321.txt
test.txt

c:\

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@echo off & setlocal enableDelayedExpansion

for /f "delims=" %%i in ('dir /b "*.txt"') do (

	set "str=A%%~ni"
    set "len=0"
    for /L %%A in (12,-1,0) do (
        set /a "len|=1<<%%A"
        for %%B in (!len!) do if "!str:~%%B,1!"=="" set /a "len&=~1<<%%A"
    )
	
	if !len! equ 8 (
		echo %%~i
	)
)
pause
exit

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dir /x "????????.txt"

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dir /b *.txt|(findstr /i /b /r "[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9].txt")