如何比较两个文件并打印两个不同文件的值

Question

有2个文件。我需要先对它们进行排序，然后比较这 2 个文件，然后比较我需要打印文件 1 和文件 2 中的值的差异。

文件 1:

pair,bid,ask
AED/MYR,3.918000,3.918000
AED/SGD,3.918000,3.918000
AUD/CAD,3.918000,3.918000

文件 2:

pair,bid,ask
AUD/CAD,3.918000,3.918000
AUD/CNY,3.918000,3.918000
AED/MYR,4.918000,4.918000

输出应该是：

pair,inputbid,inputask,outputbid,outtputask
AED/MYR,3.918000,3.918000,4.918000,4.918000

2 个文件的唯一区别是 AED/MYR 具有不同的 bid/ask 速率。如何打印文件 1 和文件 2 的差值。

我尝试使用以下命令：

nawk -F, 'NR==FNR{a[]=;a[]=;next} !( in a) || !( in a) {print  FS a[] FS a[] FS  FS }' file1 file2

结果输出如下：

pair,bid,ask,bid,ask
AUD/CAD,3.918000,3.918000,3.918000,3.918000
AUD/CHF,3.918000,3.918000,3.918000,3.918000
AUD/CNH,3.918000,3.918000,3.918000,3.918000
AUD/CNY,3.918000,3.918000,3.918000,3.918000
AED/MYR,3.918000,3.918000,4.918000,4.918000

我们仍然不能只得到差异。

Answer 1

能否请您尝试在 GNU awk 中使用所示示例进行跟踪、编写和测试。

awk -v header="pair,inputbid,inputask,outputbid,outtputask" '
BEGIN{
  FS=OFS=","
}
FNR==NR{
  arr[]=[=10=]
  next
}
( in arr) && arr[]!=[=10=]{
  val=
  =""
  sub(/^,/,"")
  if(!found){
    print header
    found=1
  }
  print arr[val],[=10=]
}'  Input_file1  Input_file2

说明： 为以上添加详细说明。

awk -v header="pair,inputbid,inputask,outputbid,outtputask" '  ##Starting awk program from here and setting this to header value here.
BEGIN{                                                         ##Starting BEGIN section of this program from here.
  FS=OFS=","                                                   ##Setting field separator and output field separator as comma here.
}
FNR==NR{                                                       ##Checking condition FNR==NR which will be TRUE when Input_file1 is being read.
  arr[]=[=11=]                                                   ##Creating arr with index  and keep value as current line.
  next                                                         ##next will skip all further statements from here.
}
( in arr) && arr[]!=[=11=]{                                    ##Checking condition if first field is present in arr and its value NOT equal to [=11=]
  val=                                                       ##Creating val which has current line value in it.
  =""                                                        ##Nullifying irst field here.
  sub(/^,/,"")                                                 ##Substitute starting , with NULL here.
  if(!found){                                                  ##Checking if found is NULL then do following.
    print header                                               ##Printing header here only once.
    found=1                                                    ##Setting found here.
  }
  print arr[val],[=11=]                                            ##Printing arr with index of val and current line here.
}' Input_file1  Input_file2                                    ##Mentioning Input_files here.

Answer 2

使用 bash 进程替换，然后 join 然后选择 awk:

# print header
printf "%s\n" "pair,inputbid,inputask,outputbid,outtputask"
# remove first line from both files, then sort them on first field
# then join them on first field and output first 5 fields
join -t, -11 -21 -o1.1,1.2,1.3,2.2,2.3 <(tail -n +2 file1 | sort -t, -k1) <(tail -n +2 file2 | sort -t, -k1) |
# output only those lines, that columns differ
awk -F, ' !=  ||  != '

如何比较两个文件并打印两个不同文件的值

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