Question

这是我想要的查询：

SELECT * FROM (SELECT * FROM counter ORDER BY id DESC) AS x GROUP BY campaign_id

但是我找不到在Symfony应用程序中表达这种方法的方法。在Doctrine中使用像这样的子查询的正确方法是什么？

这一个：

$query = $em->createQuery('SELECT c
        FROM InstacountInstacountBundle:Counter c
        GROUP BY c.campaign');  
    $counts = $query->getResult();

工作正常，但我只想要我小组中的最新记录。谢谢你的帮助！

Answer 1

SELECT x.* 
  FROM counter x
  JOIN 
     ( SELECT campaign_id, MAX(id) max_id FROM counter GROUP BY campaign_id ) y
    ON y.campaign_id = x.campaign_id
   AND y.max_id = x.id;

将sql查询转换为Doctrine / dql

1 个答案: