sql - 将 sql 查询重写为 Zend_Db_Select

Question

我正在尝试将以下 sql 查询构建为 Zend_Db_Select 对象

$sql = "
    SELECT
        u.id, 
        u.email,
        s.nic as nic,
        (SELECT COUNT(*) FROM event WHERE user_id = u.id AND event='login') as logins,
        (SELECT COUNT(*) FROM event WHERE user_id = u.id AND event='export') as exports,
        (SELECT MAX(time) FROM event WHERE user_id = u.id AND event='login') as lastlogin,
        (DATEDIFF(u.expire_date, NOW())) as daysleft
    FROM 
        user u,
        seller s
    WHERE 
        u.seller_id = s.id";

没有运气。我无法让子查询在 Zend_Db_Select 对象中工作。

是否可以通过连接而不是子查询来实现相同的结果？

任何有关如何使这项工作的提示将不胜感激。

Answer 1

尝试这样的事情：

$select->from(array('u'=>'user'),array('id','email'));
$select->join(array('s'=>'seller'),'s.id = u.seller_id', array('nic'));
$select->columns(array(
    'logins'    =>"(SELECT COUNT(*) FROM event WHERE user_id = u.id AND event='login')",
    'exports'   =>"(SELECT COUNT(*) FROM event WHERE user_id = u.id AND event='export')",
    'lastLogin' =>"(SELECT MAX(time) FROM event WHERE user_id = u.id AND event='login')",
    'daysLeft'  =>"(DATEDIFF(u.expire_date, NOW()))",));
$stmt = $select->query();
var_dump($stmt->fetchAll());