You didn't show the output you desire, so I can only guess, but I would try an approach like this: 
use strict;
use warnings;
use Date::Manip;

my %owners;
while (<DATA>) {
    my ($mode, $owner, $job_id, $timestamp) = (split)[0..2,7];
    next unless $owner =~ /oracle|sybase/;
    $owners{$owner}{$job_id}{$mode} = $timestamp;
}

for my $owner (keys %owners) {
    for my $job (keys %{ $owners{$owner} }) {
        if (exists $owners{$owner}{$job}{'>'}) {
            my $t1 = $owners{$owner}{$job}{'<'};
            my $t2 = $owners{$owner}{$job}{'>'};
            my $d = DateCalc($t2, $t1);
            print "$owner - JobID:$job - RunTime:$d\n";
        }
    }
}

__DATA__
<  root 26144 c Tue Nov  2 03:10:02 2010
<  oracle 26161 c Tue Nov  2 03:10:25 2010  
<  oracle 26193 c Tue Nov  2 03:10:30 2010
<  sybase 26163 c Tue Nov  2 03:10:32 2010
>  oracle 26161 c Tue Nov  2 03:10:33 2010
<  sybase 26188 c Tue Nov  2 03:10:38 2010
>  sybase 26163 c Tue Nov  2 03:10:58 2010

[download]

Prints out: 

oracle - JobID:26161 - RunTime:-0:0:0:0:0:0:8
sybase - JobID:26163 - RunTime:-0:0:0:0:0:0:26

[download]

In reply to Re: hash array by toolic
in thread hash array by roadtest

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.