我知道已经发布了一个与此类似的问题,但我无法通过尝试在 google 上找到的东西找到我的 sql 查询的问题
我收到的错误是“您的 SQL 语法有误”
这是我的代码
select
campaigns.campaign_name,
calls.count,
first.count as first,
second.count as second,
third.count as third,
fourth.count as fourth,
fifth.count as fifth,
sixth.count as sixth
from campaigns
LEFT JOIN
(
select count(*) as count, campaign_id FROM calls where direction = 'Incoming' group by campaign_id
) as calls
ON campaigns.id = calls.campaign_id
LEFT JOIN
(
select count(*) as count,
campaign_id FROM calls
where direction = 'Incoming'
AND DATE(created_at) BETWEEN '2014-01-01' AND '2016-01-01'
group by campaign_id
) as first
LEFT JOIN
(
select count(*) as count,
campaign_id FROM calls
where direction = 'Incoming'
AND DATE(created_at) BETWEEN '2014-01-01' AND '2016-01-01'
group by campaign_id
) as second
ON campaigns.id = second.campaign_id
LEFT JOIN
(
select count(*) as count,
campaign_id FROM calls
where direction = 'Incoming'
AND DATE(created_at) BETWEEN '2014-01-01' AND '2016-01-01'
group by campaign_id
) as third
ON campaigns.id = third.campaign_id
LEFT JOIN
(
select count(*) as count,
campaign_id FROM calls
where direction = 'Incoming'
AND DATE(created_at) BETWEEN '2014-01-01' AND '2016-01-01'
group by campaign_id
) as fourth
ON campaigns.id = fourth.campaign_id
LEFT JOIN
(
select count(*) as count,
campaign_id FROM calls
where direction = 'Incoming'
AND DATE(created_at) BETWEEN '2014-01-01' AND '2016-01-01'
group by campaign_id
) as fifth
ON campaigns.id = fifth.campaign_id
LEFT JOIN
(
select count(*) as count,
campaign_id FROM calls
where direction = 'Incoming'
AND DATE(created_at) BETWEEN '2014-01-01' AND '2016-01-01'
group by campaign_id
) as sixth
ON sixth.campaign_id = campaigns.id
group by campaigns.id
错误似乎在第69行
sql 查询的最后第二行 ON sixth.campaign_id = campaigns.id
最佳答案
没有理由进行如此复杂的查询。只需使用条件聚合:
select c.campaign_name,
sum(direction = 'Incoming') as cnt,
sum(direction = 'Incoming' and DATE(created_at) BETWEEN '2014-01-01' AND '2016-01-01') as first,
. . .
from campaigns c left join
calls
on c.campaign_id = calls.campaign_id
group by c.campaign_name;
您的所有条件似乎都相同,但您可以为其他条件添加额外的 sum()
。
关于php - 多个左连接不适用于子查询,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33896620/