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Full Discussion: Matching lines across multiple csv files and merging a particular field
Top Forums Shell Programming and Scripting Matching lines across multiple csv files and merging a particular field Post 302441202 by Christoph Spohr on Thursday 29th of July 2010 06:02:12 PM
Old 07-29-2010
Hi,

if you have three files file1, file2 and file3 with content like:

file1:
Code:
"anon@yahoo.com","anon",,,,,,,,,,,,01/16/08 08:05 PM,,"WIQC PDX"
"berti@yahoo.com","anon",,,,,,,,,,,,01/16/08 08:05 PM,,"ALBI QUAZ"

file2:
Code:
"anon@yahoo.com","anon",,,,,,,,,,,,01/16/08 08:05 PM,,"OOTA"
"berti@yahoo.com","anon",,,,,,,,,,,,01/16/08 08:05 PM,,"TUZZI"

file3:
Code:
"anon@yahoo.com","anon",,,,,,,,,,,,01/16/08 08:05 PM,,"ITOS"
"berti@yahoo.com","anon",,,,,,,,,,,,01/16/08 08:05 PM,,"PANZ"

Code:
awk -F, '{if (! a[$1]){for (i=1;i<NF;i++){s=s $i FS}a[$1]=s FS $NF;s=""} \
    else{a[$1]=a[$1] $NF}}\
    END{for (i in a){gsub(/""/,", ",a[i]); print a[i]}}' file1 file2 file3

You will get:
Code:
"berti@yahoo.com","anon",,,,,,,,,,,,01/16/08 08:05 PM,,,"ALBI QUAZ, TUZZI, PANZ"
"anon@yahoo.com","anon",,,,,,,,,,,,01/16/08 08:05 PM,,,"WIQC PDX, OOTA, ITOS"

HTH Chris
 

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LEARN ABOUT DEBIAN

ifpps

ifpps(8)							netsniff-ng-toolkit							  ifpps(8)

NAME

       ifpps - fetch and format kernel network statistics

SYNOPSIS

       ifpps	 -d|--dev <netdev> [-t|--interval <sec>][-p|--promisc][-c|--term]
	    [-C|--csv][-H|--csv-tablehead][-l|--loop][-v|--version][-h|--help]

DESCRIPTION

       A tiny tool to provide top-like reliable networking statistics.	ifpps reads out the 'real' kernel statistics, so it does not give
       erroneous statistics on high I/O load.

OPTIONS

       ifpps --dev eth0
	   Fetch eth0 interface statistics.

       ifpps --dev eth0 --interval 60 --csv
	   Output eth0 interface statistics every minute in CSV format.

OPTIONS

       -h|--help
	   Print help text and lists all options.

       -v|--version
	   Print version.

       -d|--dev <netdev>
	   Device to fetch statistics for i.e., eth0.

       -p|--promisc
	   Put the device in promiscuous mode

       -t|--interval <time>
	   Refresh time in sec (default 1 sec)

       -c|--term
	   Output to terminal

       -C|--csv
	   Output in CSV format.  E.g. post-processing with Gnuplot et al.

       -H|--csv-tablehead
	   Print CSV table head.

       -l|--loop
	   Loop terminal output.

AUTHOR

       Written by Daniel Borkmann <daniel@netsniff-ng.org>

DOCUMENTATION

       Documentation by Emmanuel Roullit <emmanuel@netsniff-ng.org>

BUGS

       Please report bugs to <bugs@netsniff-ng.org>

								    2012-06-29								  ifpps(8)
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