my $dbh   = DBI->connect($dsn, $userid, $password, { RaiseError => 1 }) or die $DBI::errstr;
my $query = "SELECT * FROM logs_column WHERE logged_in > NOW()::timestamp - interval '24hour'";
my $sth   = $dbh->prepare($query);

$sth->execute();

while (my @row = $sth->fetchrow_array) {
    print "@row\n";
}