DQL / SQL GROUP BY MONTH（）

Question

是否可以將僅日期作為列的GROUP BY month？ 這可以通過PHP循環來實現，但我更喜歡使用SQL。 實時代碼如下：

    $query = $this->em
            ->createQuery("SELECT Month(p.planDate), SUM(ROUND(p.ndata5/1000)) AS volume "
                    . "FROM NTPBundle:ParagonData p WHERE p.planDate >= :startDate AND p.ndata5<>0 GROUP BY Month(p.planDate) ORDER BY p.planDate")
            ->setParameter('startDate', $this->startDate->format('Y-m-d'));

Answer 1

正確排序，您必須先命名，然后選擇ORDER BY此名稱，例如：

 $query = $this->em
            ->createQuery("SELECT Month(p.planDate) as monthPlan, SUM(ROUND(p.ndata5/1000)) AS volume "
                    . "FROM NTPBundle:ParagonData p WHERE p.planDate >= :startDate AND p.ndata5<>0 "
                    . "GROUP BY monthPlan "
                    . "ORDER BY p.planDate")
            ->setParameter('startDate', $this->startDate->format('Y-m-d'));

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