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Full Discussion: Comparing 2 csv files and matching content
Top Forums Shell Programming and Scripting Comparing 2 csv files and matching content Post 302341448 by ghl10000 on Thursday 6th of August 2009 03:09:53 AM
Old 08-06-2009
Comparing 2 csv files and matching content
Hello,

I have the following problem:

There are two csv files

csv-file #1:
Code:
aaa1, aaa2, ... aaan
aaa1, bbb2, ... bbbn
aaa1, ccc2, ... cccn
bbb1, bbb2, ... bbbn
...
zzz1, zzz2, ... zzzn

csv-file #2:
Code:
aaa1, matchvalue1
ccc1, matchvalue2
bbb1, matchvalue3
...

Each line of csv-file #1 shall get appended the crresponding "matchvalue" of csv-file #2,
e.g. if a line contains the reference value aaa1, this line shall be appended by matchvalue1 of csv-file #2.

Finally csv-file #2 would look like this:

Code:
aaa1, aaa2, ... aaan, matchvalue1
aaa1, bbb2, ... bbbn, matchvalue1
aaa1, ccc2, ... cccn, matchvalue1
bbb1, bbb2, ... bbbn, matchvalue3
...

In csv-file #1 the "reference values" - in my example the first element of the line, may occur in more than one line.

In the example it is the first element of each line.
How would the script look like if it may be at any other particular position of the line, e.g. always the third element of each line ?

Can anyone please help me and submit a solution ?

Thanks so much !

Regards
G.
 

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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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