Join 2 CSVs based on 1 key Post: 302981614

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Top Forums Shell Programming and Scripting Join 2 CSVs based on 1 key Post 302981614 by Don Cragun on Thursday 15th of September 2016 05:48:50 PM

09-15-2016

Registered User

You say that the input files are CSVs, but that usually means that a single character is used to separate fields in those files. Instead of that, the files you have shown us have varying numbers of spaces between fields (and in the case of one line in a.csv), some extraneous spaces at the end of the line).

I will make the wild guess that your real input files are intended to be <tab> separated instead of separated by sequences of one or more <space>s. I further assume that you want the output to be in the same order as the sequence of lines that appear in the a.csv input file. If all of these assumptions are correct, the following seems to produce the output you want (except for the line with the trailing <tab> or <space>s in a.csv:

Code:

awk '
FNR == NR {
	car[$1] = $2
	next
}
$2 in car {
	$0 = $0 "\t" car[$2]
}
1' b.csv a.csv

which produces the output:

Code:

name  phone    adress    car
xy    1234    asbd	honda
yz    2134    asbdf   	toyota
tc    6789    salkdur	bmw

As always, if you want to try this on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk or nawk.

Don Cragun

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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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