Question

我有这3个表（有这些结构）：

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我有这个查询：

        outreach
        id  url              profile_id
------------------------------------------
        40  www.google.com     2
        41  www.yahoo.com      3
        42  www.test.com       1

        outreach_links
        id outreach_id end_date           status 
    -----------------------------------------------
        1   41          2016-01-12        Pending
        2   40          2016-03-12        Pending
        3   40          2016-02-12        Approved

        comments
        id outreach_id  name
    ----------------------------
        1   40
        2   40
        3   40

我正在尝试修复此查询并使其也选择以下内容：

select o.*, 
SUM(if(ol.status = "Approved" and (ol.end_date > now() or end_date is null), 1, 0)) as cond1, 
SUM(if(ol.status = "Pending" and (ol.end_date != now() or end_date is null), 1, 0)) as cond2,
SUM(if(ol.status = "Pending" and (ol.end_date < now()), 1, 0)) as cond3
from outreach o 
left join outreach_links ol on ol.outreach_id = o.id 
where o.profile_id=2
group by o.id
having (cond1 = 0 and cond2 = 0) or (cond1 = 0 and (cond2 = 1 and cond3 >=1)) order by ol.end_date desc

可能吗？

现在这里是输出

1). ol.* ONLY if MAX(end_date) and
2). Count(id.comment) count all comments for that particular row

我想添加

+"id": "40"
+"profile_id": "2"
+"url": "http://www.google.com"
+"created_at": "2016-12-05 21:55:10"
+"updated_at": "2016-12-05 22:49:56"
+"cond1": "0"
+"cond2": "0"
+"cond3": "5"

由于

Answer 1

您是否想要获取最新的更新日期？以下查询应该为您提供最新的更新日期。

但是，我不明白你想要获得cond1，cond2，cond3以及应该填充什么作为created_date和updated_date？你能给出这些领域的定义吗？

SELECT o.*, ol.*, COUNT(c.id)
FROM outreach o 
LEFT JOIN outreach_links ol ON ol.outreach_id = o.id
LEFT JOIN comments c ON c.outreach_id = o.id
WHERE ol.id = (SELECT ol2.id
                 FROM outreach_links ol2
                 WHERE ol2.outreach_id = ol.outreach_id            
                 ORDER BY ol2.end_date, ol2.id DESC
                 LIMIT 1)
      OR ol.id IS NULL
GROUP BY o.id, ol.id

MYSQL查询选择条件＆amp;加入

1 个答案: