Zool! Arty Workshop

If you find yourself writing something like the following code, try to stop and think for a while (the example uses PHP Database Objects extension):

$insert = $dbh->prepare('INSERT INTO cheapBooks VALUES (?)');

foreach($dbh->query('SELECT ID FROM Books WHERE price < 10') as $book){
        // Insert cheap books into a temporary table
        $insert->execute(array($book['ID']));
}