Yes. Use placeholders.

unshift @fields, qw(hostname host_id);
my $insert = "INSERT IGNORE INTO $thisTable (" . join(", ", @fields) .
+ ") VALUES (" . join(",", ('?') x @fields) . ")";

while (my @row = $dbq->fetchrow_array) {
  my $this_insert = [ $site_hostname, $site_id, @row ];
  push @central_insert, $this_insert;
}

[download]
Then you will have to prepare the $insert, and execute that statement handle while passing in the variables: 
my $sth = $dbh->prepare($insert);
$sth->execute(@$_) for @central_insert;

[download]
Of course, add in some error handling, and probably turn off autocommit if there's lots of inserts going on at a time.

Try a Super Search for placeholders - should turn up a lot of hits.

In reply to Re: DBI - Handling NULL values by Tanktalus
in thread DBI - Handling NULL values by McDarren

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.