This code pretty much meets your specs. It can handle 0-600 data items. I've left DBI specifics out for illustration purposes. Not pretty, but clear. Would've been less kludgey if it were 1-600 instead of 0-600. 
my $ctr = 0;
for ($ctr = 0; $ctr < 601; $ctr++) {
   $indexs[$ctr] = "-$ctr-";
}
$ctr = 0;
print "<html><body><table border=1>";
while ($ctr < 201) {
   print "<tr><td>";
   if ($indexs[$ctr]) {
      print $indexs[$ctr];   ### first col current row ($ctr)
   } else {
      print '&nbsp;';
   }
   print '</td><td>';
   if (($indexs[$ctr + 201]) and ($ctr+201 != 401)) {
      print $indexs[$ctr + 201];   ### second col current row ($ctr)
   } else {
      print '&nbsp;';
   }
   print "</td><td>";
   if ($indexs[$ctr + 401]) {
      print $indexs[$ctr + 401];   ### third col current row ($ctr)
   } else {
      print '&nbsp;';
   }
   print "</td></tr>\n";
   $ctr++;
}

print "</table></body></htm>\n";

[download]

In reply to Re: DBI output in 3 columns by jlongino
in thread DBI output in 3 columns by Donzo

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.