prepare just parses the sql statement (readies it for execution). You still need to execute the sql.

$sth = $dbh->prepare( "Your sql statement" ) or
   die "yadda";
$sth->execute();
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Also, you may want to look at the latest tutorial from Tim Bunce (DBI author) on how to write DBI code more idiomatically (using RaisError vice checking errstr, using prepare -vs- prepare_cached, using placeholders, etc).

-derby