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Full Discussion: Merge the three csv files as one according to first coloumn.
Top Forums UNIX for Beginners Questions & Answers Merge the three csv files as one according to first coloumn. Post 303036403 by RudiC on Tuesday 25th of June 2019 04:04:09 AM
Old 06-25-2019
Try this for merging data according to the field 1 values, trying to keep the order of lines to the first file's. It partly takes care of $1 values disappearing or newly occurring, but does not care for the order those appear in the output lines. For more convoluted input cases, additional measures need to be taken.
Code:
awk '
!F[$1]  {F[$1]    = $1
         C[++CNT] = $1
        }
        {for (i=2; i<=NF;i++) T[$1,i] = T[$1,i] OFS $i
        }
END     {for (j=1; j<=CNT; j++) {printf "%s", C[j]
                                 for (i=2; i<=NF; i++) printf "%s", T[C[j],i]
                                 printf ORS
                                }
        } 
 ' FS=, OFS=, file[1-3]


Be aware that your sample output file does NOT correctly reflect the input data!
This User Gave Thanks to RudiC For This Post:
Raghuram717
 

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LEARN ABOUT DEBIAN

csv2po

csv2po(1)						      Translate Toolkit 1.9.0							 csv2po(1)

NAME

       csv2po - convert Comma-Separated Value (.csv) files to Gettext PO localization files

SYNOPSIS

       csv2po  [--version]  [-h|--help]  [--manpage]  [--progress  PROGRESS]  [--errorlevel  ERRORLEVEL] [-i|--input] INPUT [-x|--exclude EXCLUDE]
       [-o|--output] OUTPUT [-t|--template TEMPLATE] [--charset CHARSET] [--columnorder] [--duplicates DUPLICATESTYLE]

DESCRIPTION

       See: http://translate.sourceforge.net/wiki/toolkit/csv2po for examples and usage instructions

OPTIONS

       --version
	      show program's version number and exit

       -h/--help
	      show this help message and exit

       --manpage
	      output a manpage based on the help

       --progress
	      show progress as: dots, none, bar, names, verbose

       --errorlevel
	      show errorlevel as: none, message, exception, traceback

       -i/--input
	      read from INPUT in csv format

       -x/--exclude
	      exclude names matching EXCLUDE from input paths

       -o/--output
	      write to OUTPUT in po, pot formats

       -t/--template
	      read from TEMPLATE in pot, po, pot formats

       --charset
	      set charset to decode from csv files

       --columnorder
	      specify the order and position of columns (location,source,target)

       --duplicates
	      what to do with duplicate strings (identical source text): merge, msgctxt (default: 'msgctxt')

							      Translate Toolkit 1.9.0							 csv2po(1)
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