It is possible to use placeholders with do. The syntax is: 
$rows = $dbh->do("UPDATE your_table SET foo = ?", undef, $foo);

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However, you don't need to use do though. execute returns the number of rows updated for a non-SELECT statement.

In reply to Re: (jeffa) Re: DBI multiple prepares by iburrell
in thread DBI multiple prepares by vivekvp

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