将Java sql查询从UNION更新为JOIN

我有以下疑问,， 表PCA和PC具有相似的结构（相同的列）

现在，我想将duration2和delta2的wc2和wc_efficiency2作为单独的列进行分离。为了实现这一点，我更新了我的查询，如下所示：

select session, wc1, sum(duration1) / (sum(delta1) + sum(duration1)) as wc_efficiency1, wc2, sum(duration2) / (sum(delta2) + sum(duration2)) as wc_efficiency2 from
(
SELECT 
a.session as ss, a.panel as pl,
a.line_location as WC1, 
a.line_duration as duration1, 
a.line_lead_duration - b.line_lead_duration as delta1

FROM PCA a 
join PC b
on a.batch = b.batch and a.session = b.session and a.panel = b.panel
where a.line_location is not null
) t1

join

(
SELECT 
a.session as ss, a.panel as pl,
a.completion_location as WC2, 
a.completion_duration as duration2, 
a.completion_lead_duration  - b.completion_lead_duration as delta2

FROM PCA a 
join PC b
on a.batch = b.batch and a.session = b.session and a.panel = b.panel
where a.completion_location is not null
) t2
ON t1.ss = t2.ss and t1.pl = t2.pl
group by wc1, wc2

---

查询没有运行，我找不到错误

“查询不运行”这具体是什么意思？它会给你一个语法错误吗？它是否运行但不返回结果？还是错误的结果？它是否开始运行，但似乎需要无限的时间？更新您的问题添加适当的数据样本，并将预期结果作为表格文本查询开始运行，但似乎需要无限的时间。@下划线d

select session, wc1, sum(duration1) / (sum(delta1) + sum(duration1)) as wc_efficiency1, wc2, sum(duration2) / (sum(delta2) + sum(duration2)) as wc_efficiency2 from
(
SELECT 
a.session as ss, a.panel as pl,
a.line_location as WC1, 
a.line_duration as duration1, 
a.line_lead_duration - b.line_lead_duration as delta1

FROM PCA a 
join PC b
on a.batch = b.batch and a.session = b.session and a.panel = b.panel
where a.line_location is not null
) t1

join

(
SELECT 
a.session as ss, a.panel as pl,
a.completion_location as WC2, 
a.completion_duration as duration2, 
a.completion_lead_duration  - b.completion_lead_duration as delta2

FROM PCA a 
join PC b
on a.batch = b.batch and a.session = b.session and a.panel = b.panel
where a.completion_location is not null
) t2
ON t1.ss = t2.ss and t1.pl = t2.pl
group by wc1, wc2