结合 2 个复杂的查询

Question

首先，我无法提供 SQL Fiddle，因为要重新创建数据真的很复杂。我将尝试尽可能清楚地呈现查询、输出和问题。

我有一个看起来像这样的查询：

with cte(MainArt,secondaryArt, Quantity) as(
SELECT t_mitm, t_sitm, t_qana
            FROM ttibom010201 
        WHERE TRIM(t_mitm) = 'ACL-4812070395-4'
union all
select 
ttibom010201.t_mitm, ttibom010201.t_sitm, ttibom010201.t_qana
from ttibom010201 inner join cte on cte.secondaryArt=ttibom010201.t_mitm
        )
select    cte.* ,dsc.t_cuni, dsc.t_dsca from cte
left join ttcibd001201 dsc on dsc.t_item = cte.secondaryArt 
where TRIM(secondaryArt)  like N'30%'

这个确切的查询返回了这 4 行：

从另一个表中，我使用这个secondArt值来获取一些信息：

select top 1 t_orno, t_item,t_pric from ttdpur401201 where t_item like '%30102024%' order by  t_ddte desc

结果是：

正如您所看到的 t_item 和 secondaryArt 是相同的（第一个查询的第 3 行和第 4 行）。所以我希望能够以某种方式将这 2 个查询合并为 1 个。在第一个表中，我只需要添加这个t_pric。

如何合并这两个查询？

Answer 1

两个查询之间的左连接就可以解决问题。

  with cte(MainArt,secondaryArt, Quantity) as(
SELECT t_mitm, t_sitm, t_qana
            FROM ttibom010201 
        WHERE TRIM(t_mitm) = 'ACL-4812070395-4'
union all
select 
ttibom010201.t_mitm, ttibom010201.t_sitm, ttibom010201.t_qana
from ttibom010201 inner join cte on cte.secondaryArt=ttibom010201.t_mitm
        )
select    cte.* ,dsc.t_cuni, dsc.t_dsca, t_pric from cte
left join ttcibd001201 dsc on dsc.t_item = cte.secondaryArt 
Left join (select  t_orno, t_item,t_pric from ttdpur401201 inner join cte on t_item like cte.secondaryArt order by  t_ddte desc) t
on cte.secondaryArt = t.t_item
where TRIM(secondaryArt)  like N'30%'

新修改的答案：

with cte(MainArt,secondaryArt, Quantity) as(
SELECT t_mitm, t_sitm, t_qana
            FROM ttibom010201 
        WHERE TRIM(t_mitm) = 'ACL-4812070395-4'
union all
select 
ttibom010201.t_mitm, ttibom010201.t_sitm, ttibom010201.t_qana
from ttibom010201 inner join cte on cte.secondaryArt=ttibom010201.t_mitm
        )
select    cte.* ,dsc.t_cuni, dsc.t_dsca, t_pric from cte
left join ttcibd001201 dsc on dsc.t_item = cte.secondaryArt 
Left join (select top 1 t_orno, t_item,t_pric,row_number()over(partition by t_item order by t_ddte desc) rnfrom ttdpur401201 ) t
on t.t_item like cte.secondaryArt  and t.rn=1
where TRIM(secondaryArt)  like N'30%'