用联合连接子查询（一个 table 有两个条件）

Question

我有 1 个 table 具有 2 个不同的条件。我要呈现AR，年，AR/年*365.

下面的代码可以运行

select AR, AR*365 
from (select sum(total_amount) AR
from invoices
where issue_date is not null and closed_at is null
and issue_date <= 'January 1,2020' and issue_date <DATEADD (DAY, 1, 'December 31,2020') 
UNION
select sum(total_amount)
from invoices
where closed_at <= 'January 1,2020' and closed_at <DATEADD (DAY, 1, 'December 31,2020')
)x group by AR;

结果：

   AR
1,895.23            15,903,040.94
691,758.95          5,804,609,943.1

然后我想显示 AR，年度，AR/annual*365 但出现错误：

select AR, annual, AR/annual*365 from
(select sum(total_amount) AR
from invoices
where issue_date is not null and closed_at is null
and issue_date <= 'January 1,2020' and issue_date <DATEADD (DAY, 1, 'December 31,2020')
UNION
select sum(total_amount) annual
from invoices
where closed_at <= 'January 1,2020' and closed_at <DATEADD (DAY, 1, 'December 31,2020'))x group by         
AR;

当要显示"annual"的年值时第一个line/firstselect无法读取...

但是当我们删除第一行的“annual”时，annual 可以读取。

我想读取第一行/第一个 select 的“年度”，以便可以用其他值计算它。

有人知道怎么解决吗？

Answer 1

您可以按如下方式使用条件聚合：

Select AR, annual, AR/annual*365 from
(select sum(case when issue_date is not null and closed_at is null
                  and issue_date <= 'January 1,2020' 
                  and issue_date <DATEADD (DAY, 1, 'December 31,2020') 
                 then total_amount end) AR,
        sum(case when closed_at <= 'January 1,2020' 
                  and closed_at <DATEADD (DAY, 1, 'December 31,2020') 
                 then total_amount end) as annual
   from invoices) t

有可能 annual 是 0 并且它被用在除法中所以在那里使用适当的逻辑。

用联合连接子查询（一个 table 有两个条件）

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