比较两个文件中的两列，并将两个文件中的任何一个中的输出作为新列附加

Question

csv 文件 1：

Scorecard_1,ZDTJ_PREV.EXT,12
Scorecard_2,ZACN_PREV.EXT,6
Scorecard_3,ABC.txt,8

文本文件 2：

Acct_Bal_Non_Zero_Tgt.txt,7243
IDQ_HB1.txt,5380
IDQ_HB_LOGC.txt,5380
ZACN_PREV.EXT,4
ZDTJ_PREV.EXT,3
ABC.txt,10

输出：

Acct_Bal_Non_Zero_Tgt.txt,No_Match
    IDQ_HB1.txt,No_Match
    IDQ_HB_LOGC.txt,No_Match
    ZACN_PREV.EXT,New_File
    ZDTJ_PREV.EXT,New_File
    ABC.txt,Old_File

逻辑：如果第二个文件中存在匹配的文件，则比较两个文件的最后一列。如果文件一的最后一列大于第二个文件的最后一列，则该文件为新文件，否则该文件为旧文件。

我的任务是根据间隔（第一个文件的最后一列）确定文件是当天还是前一天。 我的方法非常简单，我知道通过 awk 有一种更简单的方法。

到目前为止，我已经尝试过：

File_in_CSV=$(cat file_1.csv | awk -F "," '{ print $3 }' | tail --lines=+1 | sort -u | uniq )
File_in_age_file=$(cat File_2.txt | awk -F "," '{ print $1 }' | tail --lines=+1 | sort -u | uniq )
Age=$(cat All_Files_Age.txt | awk -F "," '{ print $2 }' | tail --lines=+1 | sort -u | uniq )
Interval=$(cat scorecard_file_details.csv | awk -F "," '{ print $4 }' | tail --lines=+1 | sort -u | uniq )
for file in $File_in_CSV; do
if [[ "$file" = $File_in_age_file && $Age>$Interval ]]; then
printf "%s\n" "File is of Previous Day!"
else
printf "%s\n" "File is of Current Day!"
fi
done

我还希望将前一天或当天的这个标志作为一列附加到任何文件中。 感谢您对此的帮助！

预期输出的示例是：

FileName, Flag
ABC.txt, New_File/Old_File

Answer 1

您能否尝试在 GNU awk 中使用所示示例进行跟踪、编写和测试。

awk '
BEGIN{
  FS=OFS=","
}
FNR==NR{
  arr[$2]=$NF
  next
}
{
  print $1,(($1 in arr)?($NF>arr[$1]?"Old_file":"New_File"):"No_Match")
}
'  Input_file1  Input_file2

说明：为上述添加详细说明。

awk '                           ##Starting awk program from here.
BEGIN{                          ##Starting BEGIN section of this program from here.
  FS=OFS=","                    ##Setting field separator and outpout field separator as comma.
}
FNR==NR{                        ##Checking condition if FNR==NR when Input_file1 is being read.
  arr[$2]=$NF                   ##Creating arr with index of 2nd field and having value as last field.
  next                          ##next will skip further statements from here.
}
{
  print $1,($1 in arr)?($NF>arr[$1]?"Old_file":"New_File"):"No_Match"
                                ##printing 1st field and checking condition if 1st field is present in arr then check
                                ##if last field is greater than arr value then print Old_file else print
                                ##New_file OR if 1st field is NOT in arr then print No_Match.
}
'  Input_file1  Input_file2     ##Mentioning Input_file names here.