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awk - 如何将重复的行合并到具有主键和多于一列信息的同一行中

问题描述

这是我的数据：

NAME1,NAME1_001,NULL,LIC100_1,NULL,LIC300-3,LIC300-6
NAME1,NAME1_003,LIC000_1,NULL,NULL,NULL,NULL
NAME2,NAME2_001,LIC000_1,NULL,LIC400_2,NULL,NULL
NAME3,NAME3_001,NULL,LIC400_2,NULL,NULL,LIC500_1
NAME3,NAME3_005,LIC000_1,NULL,LIC400_2,NULL,NULL
NAME3,NAME3_006,LIC000_1,NULL,LIC400_2,NULL,NULL
NAME4,NAME4_002,NULL,LIC100_1,NULL,LIC300-3,LIC300-6

预期结果：

NAME1|NAME1_001|NULL|LIC100_1|NULL|LIC300-3|LIC300-6|NAME1_003|LIC000_1|NULL|NULL|NULL|NULL
NAME2|NAME2_001|LIC000_1|NULL|LIC400_2|NULL|NULL
NAME3|NAME3_001|NULL|LIC400_2|NULL|NULL|LIC500_1|NAME3_005|LIC000_1|NULL|LIC400_2|NULL|NULL|NAME3_006|LIC000_1|NULL|LIC400_2|NULL|NULL
NAME4|NAME4_002|NULL|LIC100_1|NULL|LIC300-3|LIC300-6

我尝试了以下命令，但不知道如何添加详细信息（3 美元到 7 美元）

awk '
    BEGIN{FS=","; OFS="|"}; 
    { arr[$1] = arr[$1] == ""? $2 : arr[$1] "|" $2 }   
    END {for (i in arr) print i, arr[i] }' file.csv

有什么建议吗？谢谢！！

标签： awk

解决方案

请您尝试以下操作。用 GNU 中的示例编写和测试awk。

awk '
BEGIN{
  FS=","
  OFS="|"
}
FNR==NR{
  first=$1
  $1=""
  sub(/^,/,"")
  arr[first]=(first in arr?arr[first] OFS:"")$0
  next
}
($1 in arr){
  print $1 arr[$1]
  delete arr[$1]
}
' Input_file  Input_file

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=","                    ##Setting FS as comma here.
  OFS="|"                   ##Setting OFS as | here.
}
FNR==NR{                    ##Checking FNR==NR which will be TRUE when first time Input_file is being read.
  first=$1                  ##Setting first as 1st field here.
  $1=""                     ##Nullifying first field here.
  sub(/^,/,"")              ##Substituting starting comma with NULL in current line.
  arr[first]=(first in arr?arr[first] OFS:"")$0  ##Creating arr with index of first and keep adding same index value to it.
  next                      ##next will skip all further statements from here.
}
($1 in arr){                ##Checking condition if 1st field is present in arr then do following.
  print $1 arr[$1]          ##Printing 1st field with arr value here.
  delete arr[$1]            ##Deleting arr item here.
}
' Input_file  Input_file    ##Mentioning Input_file names here.

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