On 07/12/11 1:57 AM, Martin J. Evans wrote:
On 12/07/11 08:32, ZhangJun wrote:
my $dbh = DBI->connect();
my $sth1 = $dbh->prepare( $sql_a );
my $sth2 = $dbh->prepare( $sql_b );
$sth1->execute;
$sth2->execute;
while ( my ($id) = $sth1->fetchrow_array ) {
$sth2->execute( $id )
}
# is it possible ?
Sometimes. Depends on which DBD you are using and then sometimes it
depends on which driver you are using under that DBD.
You'll need to tell us which DBD (and possibly driver) you are using.
I might also comment that you can generally achieve that sort of
operation via a single statement using a SQL JOIN, and do so far more
efficiently than what you show above, as it will reduce round trips to
the database.
--
john r pierce N 37, W 122
santa cruz ca mid-left coast
