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/=========================================================================

my $sql = "SELECT count(*) FROM tbl_name WHERE id=
$keywords
";
my $sth = $dbh->prepare($sql, { RaiseError => 1 });
$sth->execute();
my $rs = $sth->fetchrow_arrayref->[0];
$sth->finish();

# print the number of rows
print $rs;

=========================================================================/

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