your code seems to be more relevant to my problem....I implemented the technique and heres my edited code... 
#!/usr/bin/perl
use strict;
use warnings;


# source file directory
my $srcdir = "../source";

# source file name
my $srcfile = $srcdir."/vol.dat"; 

# Open source file.
open (READ, "< $srcfile") || die "Can't find the DAT file\n";



my $epochToday = time;
$epochToday = $epochToday - 2592000;
my ($year, $month, $day) = (localtime($epochToday))[5,4,3];
$month++;
$year+=1900;

my $startdate = $year."-".$month."-".$day;


my $x=0;
my $info;
my @input;
while ($info = <READ>) 
{
    chomp $info;
    my @data = split (/,/, $info);
    push @input, [@data];
    $x++;
}

close READ || die "Couldn't close the DAT file";

@ordered_input);

my $desdir = "../target";
my $desfile = $desdir."/total_volume.csv";
open (WRITE, "> $desfile") || die "Can't find the CSV file.\n";

my @headers = ("Date",",","Total_Volume");
print WRITE @headers,"\n";

my $printout;

while (@input) 
{
    my $start = $startdate;
    my $end   = "eof";
    if ( /^$start/../^$end/ ) 
    {
        chomp;
        my (@items) = split /,/;
        $printout .= "%s,%d\n", $items[0], $items[1] + $items[2];
    }
}

print WRITE $printout;
close WRITE || die "Couldn't close the CSV file";
exit  0;

[download]
but im getting and infinite loop error: 
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Use of uninitialized value $_ in pattern match (m//) at basic.pl line 
+63.
Terminating on signal SIGINT(2)
Terminating on signal SIGINT(2)

[download]
kindly help in this matter..

Thanks
AvantA

In reply to Re^2: copying records from one file to another with filter. by avanta
in thread copying records from one file to another with filter. by avanta

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