[英]Translating sql query into Doctrine/dql
This is the query I want: 这是我想要的查询:
SELECT * FROM (SELECT * FROM counter ORDER BY id DESC) AS x GROUP BY campaign_id
but I can´t find a way to express this in my Symfony application. 但是我找不到在我的Symfony应用程序中表达这一点的方法。 What is the correct way to use subqueries like this one in Doctrine? 在Doctrine中使用这种子查询的正确方法是什么?
This one: 这个:
$query = $em->createQuery('SELECT c
FROM InstacountInstacountBundle:Counter c
GROUP BY c.campaign');
$counts = $query->getResult();
is working fine, but I want only the latest records in my group. 工作正常,但我只需要小组中的最新记录。 Thanks for any help! 谢谢你的帮助!
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;
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