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Full Discussion: Linux - Join 2 csv files with common key
Top Forums Shell Programming and Scripting Linux - Join 2 csv files with common key Post 302965708 by RichZR on Tuesday 2nd of February 2016 09:03:25 AM
Old 02-02-2016
Quote:
Originally Posted by RavinderSingh13
Hello RichZR,

Adding one more query to Rudi's questions. I can see like fields are not always constant in Input_file2 eg. Ken, 4, M, , 12, Iceland and other lines have 5 fields only. So is it the case or it is a typo, could you please confirm on same. Also code tags as per forum rules for Inputs/commands/codes which you use in your posts.

Thanks,
R. Singh
Hi Ravinder,

Apologies - That was a typo from my side. I have amended this now in my original post. Also amended the Quote section to a Code Section.

---------- Post updated at 02:03 PM ---------- Previous update was at 01:58 PM ----------

Quote:
Originally Posted by RudiC
Any attempts/ideas/thoughts from your side?

---------- Post updated at 14:50 ---------- Previous update was at 14:49 ----------

And, better use code tags for data, in lieu of quote tags...
Hi Rudi,

I have found the following examples within the forum which I am sure could be tailored towards my requirement, however I am not massively experienced within Awk, to breakdown the following examples into sections I can understand to tweak:

Example 1:

Code:
awk 'FNR==NR{A[$1]=$1;next} ($1 in A){print $0 FS A[$1]} !($1 in A){print $0}' file1 FS=, file2

Example 2:

Code:
awk 'FNR==NR{T[$1]=$3 FS $4; next} {print $0, T[$1]}' file2 file1

Cheers.
 

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LEARN ABOUT CENTOS

processcsv.py

PROCESSCSV.PY(1)					      Virtualization Support						  PROCESSCSV.PY(1)

NAME

       processcsv.py - process virt-top CSV files

SUMMARY

	virt-top --csv data.csv
	processcsv.py < data.csv

DESCRIPTION

       virt-top is a top(1)-like utility for showing stats of virtualized domains.

       processcsv.py is a simple Python script that post-processes the output of "virt-top --csv".

       It is used like this:

	virt-top --csv data.csv
	processcsv.py < data.csv

       The second command will overwrite the following files in the current directory:

       "global.csv"
	   This contains the global (host) statistics columns from the CSV file.

       "domainNN.csv" (multiple files)
	   For each libvirt domain ID NN, a file is created containing the per-domain statistics from the CSV file.

SEE ALSO

       virt-top(1)

AUTHORS

       Richard W.M. Jones <rjones @ redhat . com>

COPYRIGHT

       (C) Copyright 2007-2012 Red Hat Inc., Richard W.M. Jones http://libvirt.org/

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
       Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

virt-top-1.0.8							    2013-12-29							  PROCESSCSV.PY(1)
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