zend框架中的查詢返回空數組

Question

我正在運行自定義查詢，沒有涉及模型，它返回一個空數組。

這是我使用的確切代碼：

$query = 'SELECT SUM(open_diff) opens, SUM(revenue_diff) revenue, SUM(revenue) real_rev, manual_rev, SUM(opens) actual_opens 
                         FROM data.discrepancy
                         WHERE discrepancy_date >= \''.$dateStart.'\' AND discrepancy_date <= \''.$dateEnd.'\' AND  feed_id = '.$feeds[$i]["feed_id"];

                $db = Zend_Registry::get('db_slave');
                $stmt = $db->query($query);

               $records = $stmt->fetchAll();


Zend_Debug::dump($records); gets me this result:

array(1) {
[0] => array(5) {
["opens"] => NULL
["revenue"] => NULL
["real_rev"] => NULL
["manual_rev"] => NULL
["actual_opens"] => NULL
}
}

數據在數據庫中，如果我直接在MySql中運行該查詢，我沒有問題。

請指教。

Answer 1

如果沒有匹配的記錄，MySQL將為sum（）返回null。 正在執行的最終查詢是什么（評估變量）？

我也嘗試直接在MySQL中運行它，你可能會得到相同的結果。

var_dump($dateStart, $dateEnd, $feeds[$i]['feed_id']); 

看看那些包含什么，你可能會看到問題。

Answer 2

請嘗試以下代碼

$dbAbstract = new Zend_Db_Table_Abstract();

$select = $dbAbstract->select()
    ->from(
          array('a' => 'data.discrepancy'),
          array('SUM(open_diff) AS opens', 'SUM(revenue_diff) AS revenue'), 'SUM(revenue) AS real_rev', 'SUM(opens) AS actual_opens'
    )
    ->where('discrepancy_date >=?', $dateStart)
    ->where('discrepancy_date <=?', $dateEnd)
    ->where('feed_id =?', $feeds[$i]["feed_id"]);

$result = $dbAbstract->fetchAll($select);

請刪除無效的AS