SQL oracle嵌套查询

Question

我想在ORACLE数据库中运行一个查询，但我一直在失败的白色以下错误“I.ID无效标识符”。 我想要做的是从嵌套查询中选择一个给定的结果，使用应该相互关联嵌套查询和上一级查询的过滤器。

The query is: 
SELECT i.name, WOW.BI,WOW.BC, WOW.CP 

from inv_investments i, 
inner join (select 
bi.COSTI BI, 
bc.COSTI BC, 
cp.COSTI AS CP 

FROM 
(select atom.COSTI from 
(select odf.IF_CST_TOT COSTI 
from prj_baselines bl 
inner join odf_ca_baseline odf on odf.id = bl.id 
WHERE i.id = bl.project_id 
ORDER BY bl.created_date DESC) atom where rownum =1) cp, 

(select odf.IF_CST_TOT COSTI 
from prj_baselines bl 
inner join odf_ca_baseline odf on odf.id = bl.id 
where odf.if_budget = 1 
AND i.id = bl.project_id) bi, 

(select odf.IF_CST_TOT COSTI 
from prj_baselines bl 
inner join odf_ca_baseline odf on odf.id = bl.id 
Where if_budget_corrente = 1 
AND i.id = bl.project_id) bc ) WOW on wow.ID = i.ID 

你知道如何解决吗？每次我检查在嵌套查询（如WHERE i.id = bl.project_id）我得到错误的条款等

Answer 1

假设每个子查询CP，双和bc是打算返回每个项目/投资ID一排，你应该能够独立的子查询组合成一个单一的查询 - 就像这样：

with cte as 
(select i.id, 
     i.name, 
     row_number() over (partition by i.id ORDER BY bl.created_date DESC) rn, 
     o.IF_CST_TOT, 
     o.if_budget, 
     if_budget_corrente 
from inv_investments i 
join prj_baselines b on i.id = b.project_id 
join odf_ca_baseline o on b.id = o.id) 
select max(name) name, 
     max(case rn when 1 then IF_CST_TOT end) BI, 
     max(case if_budget when 1 then IF_CST_TOT end) BC, 
     max(case if_budget_corrente when 1 then IF_CST_TOT end) CP 
from cte 
group by id 

Answer 2

以下语法不正确：

SELECT i.name, WOW.BI,WOW.BC, WOW.CP 
from inv_investments i, 
inner join (select . . . 

你有一个逗号之后i以及inner join声明。

您的查询有点难以遵循，但我认为简单的解决办法是删除inner join并将on子句更改为where子句。