I have pulled a line out of a database thus. 
$data_file="learn.data";
open(DAT, $data_file) || die("Could not open file!");
@raw_data=<DAT>;
@results = grep( /^$line[0]/, @raw_data );
foreach( @results ) {
    $record = $_;   
}

[download]
Then I have split the line thus. 
open(I, $data_path);
$found=0;
 while(<I>){
    chomp;
    @line = split(/\t/, $_);
    if($line[0] eq $GET{'id'}){
        $found=1;
        last;
    }
}
close(I);

[download]
Puzzle is. How can I ask, What is the preceding line in the database.? Give me the line that was printed just before the one we just extracted.? May god bless your living sole . Nasa.

update (broquaint): title change (was What wize monk can help?)

In reply to Print preceding line from text database by nasa

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.