从一个txt文件中查找相似的数字并将匹配的编号行保存在不同的txt中

$ cat tst.awk
{
    if ( $3 in key2out ) {
        out = key2out[$3]
        if ( $3 in key2first ) {
            print key2first[$3] > out
            delete key2first[$3]
        }
        print >> out
        close(out)
    }
    else {
        key2out[$3] = $3 ".txt"
        key2first[$3] = $0
    }
}
END {
    for (key in key2first) {
        print key2first[key] > "unique.txt"
    }
}

$ awk -f tst.awk file
$ head *.txt
==> 21563.txt <==
MAC ID 21563
OIL ID 21563

==> 4444.txt <==
Lib ID 4444
QT ID 4444
LED ID 4444

==> 80.txt <==
SOQ ID 80
TRD ID 80

==> unique.txt <==
TOP ID 638
MNO ID 3315
CAD ID 31256

使用您显示的样本，您能否尝试以下操作。用 GNU 编写和测试awk。

awk '
FNR==NR{
  arr[$NF]++
  next
}
arr[$NF]==1{
  print > ("unique.txt")
  next
}
arr[$NF]>1{
  outFile=$NF".txt"
  print >> (outFile)
  close(outFile)
}
'  Input_file Input_file

说明：为以上添加详细说明。

awk '                       ##Starting awk program from here.
FNR==NR{                    ##Checking condition which will be TRUE when Input_file is being read first time.
  arr[$NF]++                ##Creating arr with index of last field and increasing it 1 each time it comes with same one.
  next                      ##next will skip all further statements from here.
}
arr[$NF]==1{                ##Checking condition if any value(last field) occurs only 1 time in whole Input_file then do following.
  print > ("unique.txt")    ##Printing current line to unique.txt output file.
  next                      ##next will skip all further statements from here.
}
arr[$NF]>1{                 ##Checking condition if last field comes more than 1 then do following.
  outFile=$NF".txt"         ##Creating outFile variable with last field .txt to it.
  print >> (outFile)        ##Printing current line to output file here.
  close(outFile)            ##Closing output file in backend to avoid "too many opened files" error.
}
'  Input_file Input_file    ##Mentioning Input_file(s) here.

另一个 awk 创建名为1... n（f代码中的变量）的文件：

$ awk '{
    if(!($3 in a) && !($3 in u)) {
        u[$3]=$0
        next
    }
    if($3 in u) {                    # u hash holds uniques
        a[$3]=++f                    # file naming happens here
        print u[$3] >> a[$3]    
        print >> a[$3]
        close(a[$3])
        delete u[$3]                 # delete from unique hash when not unique anymore
        next
    }
    print >> a[$3]
    close(a[$3])
}
END {                                # in the end 
    f++
    for(i in u)                      # print all uniques to last file
        print u[i] > f
}' file

@ECHO OFF
SETLOCAL
rem The following settings for the source directory, destination directory, target directory,
rem batch directory, filenames, output filename and temporary filename [if shown] are names
rem that I use for testing and deliberately include names which include spaces to make sure
rem that the process works using such names. These will need to be changed to suit your situation.

SET "sourcedir=u:your files"
SET "destdir=u:your results"
SET "filename1=%sourcedir%q66304300.txt"

FOR /f "usebackqtokens=1,2,*delims= " %%u IN ("%filename1%") DO (ECHO %%u %%v %%w)>>"%destdir%%%w.txt"
FOR /f %%e IN ('dir /b /a-d "%destdir%*.txt"') DO (
 SET "multiline="
 FOR /f "usebackqskip=1" %%b IN ("%destdir%%%e") DO SET "multiline=%%b"
 IF NOT DEFINED multiline TYPE "%destdir%%%e">>"%destdir%oncers.txt"&DEL "%destdir%%%e"
)

GOTO :EOF

从在的资源文件的每一行，选择每个3个栏至%%u，%%v，%%w.TXT在假定的空目标目录并追加到文件名（第三列）。

然后从目标目录中读取每个文件。如果它只有 1 行，则将其附加到oncers.txt目标目录中并删除它。