it is better to replace the first example by 
# @ins is actually calculated at runtime. 
# Defined here for demonstration.
my @ins = qw(1 2 3 4 5 6);
my $in = join ',', map { "?" } @ins;
my $sth = $dbh->prepare("SELECT foo FROM Bar WHERE baz IN ( $in )");
$sth->execute( @ins );

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In reply to Re: DBI and variable numbers of bind parameters by Anonymous Monk
in thread DBI and variable numbers of bind parameters by friedo

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