#!/usr/bin/perl -w

use warnings;
use strict;
use strict 'vars';

use DBI;

my $dbfile = 'ksiazki.db';
my $dbh = DBI->connect("dbi:SQLite:dbname=$dbfile", "", "");

my$sth=$dbh->prepare("select * from ksiazki where id=(select max(id) from ksiazki)");
$sth->execute;
(my @dupa)=$sth->fetchall_arrayref;
my $max_id =  ${$dupa[0]}[0][0];