my $sth = dbh->prepare($count_sql) or die dbh->errstr;
$sth->execute or die $sth->errstr;
my $total = $sth->fetchrow_arrayref->[0];
my $sth = dbh->prepare($count_sql) or die dbh->errstr;
$sth->execute or die $sth->errstr;
my $total = $sth->fetchrow_arrayref->[0];