Try this... 
#!/usr/bin/perl

use strict;

my %hash;

my $raw_file_1 = <<FILE_1;
file1:
TST_01  sp|123|fts
TST_02  sp|3438|rvs
TST_03  sp|2744|rtp
TST_04  sp|0123|not_here
FILE_1

my $raw_file_2 = <<FILE_2;
file2:
sp|123|fts  checked_proved
sp|3438|rvs  proven_right
sp|2744|rtp  un_proved
sp|0000|bogus bogus
FILE_2

open( my $file_1, "<", \$raw_file_1 ) or die "Couldn't open \$raw_file
+_1\n";
while (<$file_1>) {
    next if /^file/;
    my ($val, $key) = split;
    $hash{$key} = $val;
}

open( my $file_2, "<", \$raw_file_2 ) or die "Couldn't open \$raw_file
+_2\n";
while (<$file_2>) {
    next if /^file/;
    my ($key, $val) = split;
    print "$hash{$key}\t$key\t$val\n" if ( defined($hash{$key}) );
}

[download]

In reply to Re: merging content based on common columns of 2 files using grep by bichonfrise74
in thread merging content based on common columns of 2 files using grep by heidi

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.