Hmm... It works for me as desired on your sample data.

What delimiters do you use between columns? What is your OS?

Please try this one: 

#!/usr/bin/perl -lan
BEGIN {
    die "Usage: $0 Boundary.out DB.out"
        unless @ARGV == 2;
}

if ( $isDB ) {
    print join "\t", @F, ~~grep { $_->[0] > $F[2] && $_->[1] < $F[3] }
                               @{$chr{$F[1]}}
}
else {
    push @{$chr{$F[0]}}, [ @F[1, 2] ];
    $isDB = eof;
}

[download]

In reply to Re^3: Searching and Coutning using 2 files with multiple columns by ccn
in thread Searching and Coutning using 2 files with multiple columns by shart3

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.