Zend DB表摘要

Question

在将SQL查询转换为合适的ORM查询时,我遇到了一些障碍

即使在SQL术语中,查询也非常复杂,但我正在研究将其整合到ORM查询中的方法,因为我将我在Flex中生成的许多函数转换为Zend框架模型,以便将来进行验证和API目的.

当前的平面SQL如下:

SELECT subcategory_id, 
SUM(total) / (1+(YEAR(2011)*12+MONTH(1))-(YEAR(2011)*12+MONTH(12)))      
AS monthly_average FROM aggr_subcategory WHERE user_id=1 AND month BETWEEN 01 AND 05 
         GROUP BY user_id, subcategory_id

我遇到的主要问题是SUM,我可以在ORM中管理GROUP和WHERE子句,但无法在DB Table Abstract中获得总和.

任何帮助或正确方向的点非常感谢.

Answer 1

那这个呢:

    $db = Zend_Db_Table::getDefaultAdapter();

    $select = $db->select();

    $dbExpr = new Zend_Db_Expr("SUM(total) / (1+(YEAR(2011)*12+MONTH(1))-(YEAR(2011)*12+MONTH(12))) AS monthly_average");

    $select->from(
               'aggr_subcategory', 
               array('subcategory_id', $dbExpr)               
            )->where('user_id = 1')
             ->where('month BETWEEN 01 AND 05')
             ->group(array('user_id', 'subcategory_id'));


    echo $select->assemble();
    exit;

结果是:

SELECT `aggr_subcategory`.`subcategory_id`,
SUM(total) / (1+(YEAR(2011)*12+MONTH(1))-(YEAR(2011)*12+MONTH(12))) AS monthly_average 
FROM `aggr_subcategory` 
WHERE (user_id = 1) AND (month BETWEEN 01 AND 05) 
GROUP BY `user_id`, `subcategory_id

`