Well, if you're using the prepared statement only once, it's not clear how much benefit you're getting from it. Nevertheless, if you want to do it that way, you need as many placeholders as values: 

my $sql = qq{
SELECT COUNT(*)
  FROM some_table
 WHERE some_column IN (} . join(',', (('?') x @values)) . ")";

[download]

To me the "better" way would be to prepare the statement once and execute in a loop: 

my $sql = <<END_SQL;
SELECT COUNT(*)
  FROM some_table
 WHERE some_column = ?
END_SQL

my $sth = $dbh->prepare_cached($sql) || die;

foreach my $value (@values)
{
    $sth->execute($value);
    while ($sth->fetch) 
    {
     # etc.

[download]
But it sounds like you've already thought of that.

HTH

In reply to Re: DBI question with placeholders and IN by VSarkiss
in thread DBI question with placeholders and IN by dragonchild

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