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Top Forums Shell Programming and Scripting Perl code to grep a particular column in CSV format Post 302718911 by Yoda on Sunday 21st of October 2012 12:04:14 PM
Old 10-21-2012
Script (without Perl):-

Code:
cat new.csv | awk -F, ' { print $7 "," $8 } ' | egrep -v "unix|Event" | while IFS="," read event_date create_date
do
 dt_diff=$(( $(date -d "$create_date" +%s) - $(date -d "$event_date" +%s) ))
 echo -e "${event_date}, ${create_date}, \c"
 printf "%02d:%02d:%02d\n", $(($dt_diff/3600)) $(($dt_diff%3600/60)) $(($dt_diff%60))
done

For perl example you can refer here

Last edited by Yoda; 10-21-2012 at 01:09 PM..
 

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AnyData::Format::CSV(3pm)				User Contributed Perl Documentation				 AnyData::Format::CSV(3pm)

NAME
AnyData::Format::CSV - tiedhash & DBI/SQL access to CSV data SYNOPSIS
use AnyData; my $table = adTable( 'CSV', $filename,'r',$flags ); while (my $row = each %$table) { print $row->{name}," " if $row->{country} =~ /us|mx|ca/; } # ... other tied hash operations OR use DBI my $dbh = DBI->connect('dbi:AnyData:'); $dbh->func('table1','CSV', $filename,$flags,'ad_catalog'); my $hits = $dbh->selectall_arrayref( qq{ SELECT name FROM table1 WHERE country = 'us' }); # ... other DBI/SQL operations DESCRIPTION
This is a plug-in format parser for the AnyData and DBD::AnyData modules. It will read column names from the first row of the file, or accept names passed by the user. In addition to column names, the user may set other options as follows: col_names : a comma separated list of column names eol : the end of record mark, by default quote_char : the character used to quote fields " by default escape_char : the character used to escape the quote char, " by default If you are using this with DBD::AnyData, put ad_ in front of the flags, e.g. ad_eol. Please refer to the documentation for AnyData.pm and DBD::AnyData.pm for further details. AUTHOR &; COPYRIGHT copyright 2000, Jeff Zucker <jeff@vpservices.com> all rights reserved perl v5.10.1 2004-08-17 AnyData::Format::CSV(3pm)
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