beginTransaction()是否与prepare()一起工作?

我有以下代码:

$db->beginTransaction();
$achievement_name = $db->prepare("SELECT `achievement_name` FROM `achievement_names` WHERE `id` = :a_id");
$achievement_name->bindValue(":a_id",$r['achievement_id'],PDO::PARAM_INT);
$achievement_desc = $db->prepare("SELECT `achievement_desc` FROM `achievement_names` WHERE `id` = :a_id");
$achievement_desc->bindValue(":a_id",$r['achievement_id'],PDO::PARAM_INT);
$achievement_image = $db->prepare("SELECT `image` FROM `achievement_names` WHERE `id` = :a_id");
$achievement_image->bindValue(":a_id",$r['achievement_id'],PDO::PARAM_INT);
$db->commit();

PDO是否可能?有$db->准备()和bindValue()函数，然后提交它们?它似乎不适合我，因为他们返回bool(false)。