China DOS Union

Help: How to delete all files under drive D that contain the keyword "sex"? For example, there are many files under my drive D. I want to delete files whose contents contain any one of the keywords "sex", "name", "year".

Does the content of the file contain?

Searching like this is very slow

Well, I agree with the second floor``

In this way, the system CPU usage is very likely to reach 100%``

This can be done with Windows' search function, there's no need to take the trouble to write a batch script.

Originally posted by NaturalJ0 at 2006-9-24 04:12:
You can just use the search function in Windows, there's no need to take the trouble to write a batch script.

　　If you just need to find keywords, that's okay, but if you need to search the content of files, the search function in Windows won't work.

for /f "skip=1 delims=" %i in ('findstr /m /s /d:d:\ "sex name year" *.txt') do @echo d:\%i

1. The above code runs in the command line. If it is written into a batch file, %i needs to be replaced with %%i.
2. If the printed file list is the correct result, you can change echo to del to delete the file. It is recommended to enclose d:\%i in quotes after changing to del, such as: del "d:\%i"

To achieve the owner's wish, it's not impossible, but the CPU usage will be relatively high. It's limited to processing files with text content. Try the following code (For safety, when testing, replace del /a /f "%%i" with echo "%%i"):

@echo off

for /f "tokens=*" %%i in ('dir /a-d /b /s d:\*.txt') do (

    findstr /i "sex name year" "%%i">nul && del /a /f "%%i"

)

Hehe, after posting the message, I just realized that moderator 3742668 has already replied in the '6th floor'. The moderator is good at making full use of various parameters of findstr and is very efficient. It's really powerful.

All files containing the keyword "sex" It's not just txt? Brother namejm

Originally posted by he200377 at 2006-9-24 07:31:
All files containing the keyword "sex"

It's not only txt? Brother namejm

　　I didn't understand what you meant. Do you mean that all files containing "sex" are not only referring to txt, or something else?

I used to be afraid to use find and findstr for tasks with large workloads because the search commands consumed too many resources and were very slow. I tried searching for specified strings in thousands of files, taking at least a few minutes or even more than ten minutes.

But I was very surprised when I saw the code from moderator 3742668. It turns out that findstr can be combined with these parameters to improve efficiency. And the efficiency is improved not just a little. Hehe~ Learned...

After improving according to the moderator's code, it should meet the building owner's need to search for multiple types of files.
@echo off
for %%a in (txt doc xml htm) do (
for /f "skip=1 tokens=*" %%i in ('findstr /m /s /d:d:\ "sex name year" *.%%a') do (
echo d:\%%i
)
)
pause

If there are other types, please add them in the first FOR statement.

Re pengfei:
Generally speaking, when writing batch scripts, try not to nest loop statements. After all, batch processing itself is not very efficient.
In this example, findstr can support multiple file names, so you can use code like the following to improve efficiency:

@echo off

    set "strFiles=*.txt *.bat"

    for /f "skip=1 delims=" %%i in ('findstr /m /s /d:d:\ "sex name year" %strFiles%') do echo d:\%%i

    pause 

Of course, you can also use set /p in the second sentence to accept the input file type.

Amazing, there's nothing more to say, heh~

In fact, if there are many matching files found, the batch processing efficiency is still very low. If the landlord can provide more file characteristics, such as what's special about the file names. I think this will improve a lot.

In fact, the Windows search function has a function to search by content, and it's very fast, which can search by a certain keyword in the file content.

What the moderator of version 3742668 said about the problem of nested FOR statements:

This is how I understand nested loop statements. The two FORs are divided into inner loop and outer loop. The outer loop is executed first, and the variable is put into the inner loop. When the inner loop is executed, it is transferred back to the outer loop to put the second loop value into the inner loop to execute the inner loop again. Until the loop values in the outer loop are executed, the entire loop is completed.

The moderator's is to search multiple extension files at one time, and the nested loop is to loop and search multiple extensions. The number of files found is equal, and I think the efficiency should be about the same.

Originally posted by namejm at 2006-9-24 07:41:

I didn't understand what you meant. Do you mean that all files containing "sex" are not just referring to txt, or something else?

.bat

findstr /m /s /d:d:\ "sex name year" %strFiles%

findstr /? still don't understand