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Full Discussion: Compare 2 csv files in ksh and o/p the difference in a new csv file
Top Forums Shell Programming and Scripting Compare 2 csv files in ksh and o/p the difference in a new csv file Post 302780823 by Naresh101 on Friday 15th of March 2013 07:09:44 AM
Old 03-15-2013
Thank you @Yoda....
But I used the segment with awk in your other post in my code as below ... That worked fine too.. Thanks a lot

Code:
join -t"," -1 1 -2 1 -a1 file1.csv file2.csv | awk -F, ' BEGIN {
         print "ID,field,old,new"
 } NF > 3 { 
        if ( $3 != $5 )   
              print $1, "cost", $3, $5        
       if ( $2 != $4 )              
            print $1, "version", $2, $4 } ' OFS=, 

echo "the IDs which are not present in first file are ">>file3000.csv 
awk -F, 'NR==FNR{_1[$1]++;next}!_1[$1]' file81.csv file82.csv >> file3000.csv 
cut -d',' -f1 file3000.csv>>file3001.csv 
cat file3001.csv  

echo "the IDs which are not present in second file are ">>file4000.csv 
awk -F, 'NR==FNR{_1[$1]++;next}!_1[$1]' file82.csv 
file81.csv >> file4000.csv cut -d',' -f1 file4000.csv>>file4001.csv 
cat file4001.csv

In addition to list down the differences in fields(cost / version) between 2 files I also needed to create a new file
which contains the missing IDs in a file compared to the other... The o/p which I got is as below...

ID,field,old,new
2000,cost,40,45
3000,version,3,4
3000,cost,50,55
the IDs which are not present in first file are
6000
7000
the IDs which are not present in second file are
4000
8000

---------- Post updated at 04:39 PM ---------- Previous update was at 04:24 PM ----------

And can I attain the same result as mentioned above using perl scripting?..
In that case what changes should I make?... I went through Perl script basics but it seemed to be different altogether from bash/ksh...
Last edited by Naresh101; 03-15-2013 at 08:05 AM..
 

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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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