SQL 多条件 CTE 递归
在数据库中,每个标识符都有以下 2 条信息。控制他们的公司,以及他们拥有少量控制权的公司。
大致意思是,2 个表(忽略一些唯一标识符):
组织
orgid | org_immediate_parent_orgid
1 | 2
2 | 2
3 | 1
5 | 4
关系 orgid --> org_immediate_parent_orgid 表示公司有父公司。对我而言,它仅与 org_immediate_parent_orgid 相关 ->公司母公司的 orgid 作为子公司
org_affiliations
orgid | affiliated_orgid
2 | 3
2 | 5
4 | 1
1 | 5
orgid --> affiliated_orgid 是公司有附属机构
视觉表示应类似于:
来自组织的红色关系,关于蓝色关系org_affiliations。
如果想要获取 2(或 2 的子公司的儿子)拥有的所有公司都参与其中:
select m.org_immediate_parent_orgid
,m.orgid
from oa.organizations m
where m.org_immediate_parent_orgid is not null
start with m.orgid in (Identifiers)
connect by nocycle prior m.orgid=m.org_immediate_parent_orgid
返回
org_immediate_parent_orgid| orgid
1 | 2
2 | 2
3 | 1
如果想要获取 2(或 2 的子公司的儿子)拥有的所有公司都参与其中:
select aff.orgid,aff.affiliated_orgid
from oa.org_affiliations aff
where aff.affiliated_orgid is not null
start with aff.orgid in(Identifiers)
connect by nocycle prior aff.affiliated_orgid =aff.orgid
返回
orgid | affiliated_orgid
2 | 3
2 | 5
所以可能的关系:
- Aff -->阿夫阿夫
- -->子子
- -->爱
- 夫子--> Sub
我只找到Sub --> Sub(子公司的子公司)、关系(2 --> 1 和关系 1 --> 3)和 Aff --> Aff,关系(2→3和关系2→5)。它还需要我两个单独的查询。
如何在一个递归查询中提取所有可能的关系?
如果我通过标识符 2,则应该可能出现以下返回:
Relation | Loop| orgid | children
Sub | 1 | 2 |2
Sub | 1 | 2 |1
Aff | 1 | 2 |3
Aff | 1 | 2 |5
Sub | 2 | 1 |3
Aff | 2 | 1 |5
在每个周期中将检查每个标识符的子项目和附属机构。对新孩子重复上述步骤。
关于如何处理它有什么想法吗?
TL:DR: 2 个表(子公司\附属公司),2 个查询。我想要一个查询,从一家公司的哪里可以找到所有子公司和附属公司以及所有可能的子公司\员工组合。最终的预期结果显示,只需按照图片表示即可。
编辑:正如克雷格评论的那样,我修复了输出。
编辑2:在克雷格和鲍勃·贾维斯提供的良好帮助之后,我继续遇到问题。
对于收集子公司,以下代码工作完美,输出如我所愿:
with
relations as
(
select orgid as children,org_immediate_parent_orgid as orgid,'Sub' as relation
from oa.organizations
)
select distinct relation, level, orgid, children
from relations
where children is not null
start with orgid in (identifier)
connect by
nocycle prior children = orgid
order by 2,3,4
AFF 相同:
with
relations as
(
select affiliated_orgid as children, orgid as orgid,'Aff' as relation
from oa.org_affiliations
)
select distinct relation, level, orgid, children
from relations
where children is not null
start with orgid in (identifier)
connect by
nocycle prior children = orgid
order by 2,3,4
但不能有“union all”?
with
relations as
(
select orgid as children,org_immediate_parent_orgid as orgid,'Sub' as relation
from oa.organizations
UNION ALL
select affiliated_orgid as children, orgid as orgid,'Aff' as relation
from oa.org_affiliations
)
select distinct relation, level, orgid, children
from relations
where children is not null
start with orgid in (identifier)
connect by
nocycle prior children = orgid
order by 2,3,4
在sql开发人员中,我去检查“解释从7到400k的每次跳跃的计划和成本,只需添加“union all”。有任何解决方法吗?问题在CTE内部,在union all中吗?
Bob Jarvis解决方案在某些情况下不起作用我有 comp-sub-sub-aff,或者它找到公司的所有子公司或所有附属公司
I the database i have the 2 following pieces of information for each identifier. The company that controls them, and companies where they have small bits of control.
Something along the lines, 2 tables(ignoring some unique identifiers):
organizations
orgid | org_immediate_parent_orgid
1 | 2
2 | 2
3 | 1
5 | 4
The relation orgid --> org_immediate_parent_orgid means company has parent. Por me its relevant only org_immediate_parent_orgid --> orgid the parent of the companies has as subsidiary
org_affiliations
orgid | affiliated_orgid
2 | 3
2 | 5
4 | 1
1 | 5
orgid --> affiliated_orgid is Company has affiliate
The visual representation should be something like:
On red relations from organizations, on blue relations org_affiliations.
If Want to get all companies owned by 2(or subsidiary son of 2) has some part in it them:
select m.org_immediate_parent_orgid
,m.orgid
from oa.organizations m
where m.org_immediate_parent_orgid is not null
start with m.orgid in (Identifiers)
connect by nocycle prior m.orgid=m.org_immediate_parent_orgid
returns
org_immediate_parent_orgid| orgid
1 | 2
2 | 2
3 | 1
If Want to get all companies were 2(or affiliated son of 2) has some part in it them:
select aff.orgid,aff.affiliated_orgid
from oa.org_affiliations aff
where aff.affiliated_orgid is not null
start with aff.orgid in(Identifiers)
connect by nocycle prior aff.affiliated_orgid =aff.orgid
returns
orgid | affiliated_orgid
2 | 3
2 | 5
So of all possible relations:
- Aff --> Aff
- Aff --> Sub
- Sub --> Aff
- Sub --> Sub
I only find Sub --> Sub (subsidiaries of subsidiaries), relations (2 --> 1 and relations 1 --> 3) and Aff --> Aff, relations (2 --> 3 and relations 2 --> 5). Also it requires me 2 separate queries.
How can i pull all possible relations in one single recursive query?
If i pass identifier 2 it should be possible the following return:
Relation | Loop| orgid | children
Sub | 1 | 2 |2
Sub | 1 | 2 |1
Aff | 1 | 2 |3
Aff | 1 | 2 |5
Sub | 2 | 1 |3
Aff | 2 | 1 |5
In each cycle would check subs and affiliates for each identifier. Repeat for the new children.
Any idea on how to approach it?
TL:DR: 2 tables(subsidiaries\affiliates), 2 queries. want single query where from a company i find all subsidiaries and affiliates and all possible combination of subs\affs. Final expected result show, just follow the picture representation.
Edit: As commented by Craig, I fixed the output.
Edit2: Following on the good help Craig and Bob Jarvis gave i continue to run into problems.
For gathering subsidiaries, the following code works flawlessy, and the output is as i would like:
with
relations as
(
select orgid as children,org_immediate_parent_orgid as orgid,'Sub' as relation
from oa.organizations
)
select distinct relation, level, orgid, children
from relations
where children is not null
start with orgid in (identifier)
connect by
nocycle prior children = orgid
order by 2,3,4
Same for AFF:
with
relations as
(
select affiliated_orgid as children, orgid as orgid,'Aff' as relation
from oa.org_affiliations
)
select distinct relation, level, orgid, children
from relations
where children is not null
start with orgid in (identifier)
connect by
nocycle prior children = orgid
order by 2,3,4
but cant have "union all"?
with
relations as
(
select orgid as children,org_immediate_parent_orgid as orgid,'Sub' as relation
from oa.organizations
UNION ALL
select affiliated_orgid as children, orgid as orgid,'Aff' as relation
from oa.org_affiliations
)
select distinct relation, level, orgid, children
from relations
where children is not null
start with orgid in (identifier)
connect by
nocycle prior children = orgid
order by 2,3,4
In sql developer i went and check "explain plan and cost from each jump from 7 to 400k, just by adding "union all". Any workarround? Is the problem inside the CTE, in the union alL?
Bob Jarvis solution wont work in cases where i have comp-sub-sub-aff, or it finds all subsidiaries of company or all affiliates
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将其从评论转变为实际答案,并提供我认为您需要的内容。
有几件事..其中一个是次要的..我相信您通过向后返回输出获得了第一个连接的标签。另外,我不明白你如何获得最终输出中的最后两行。 4是5的父母,而不是孩子,那为什么会出现呢?如果它不存在,那么最后一行也不会那么好。
如果我正确地阅读它,您可以使用类似的内容:
给出以下输出:
最重要的是这两个表设置为彼此相反(组织有到父级的链接,从属关系有到子级的链接)。所以我在WITH子句中将它们设置为相同的格式,然后在组合集上使用connect by。
另外,出于某种原因,Oracle 为第一个循环提供了与其他循环不同的级别,因为它是自引用。我假设如果这是一个问题,您可以为此情况添加一些自定义逻辑。
Moving this from a comment to an actual answer and providing what I believe you need.
A couple things.. one is minor.. I believe you have the labels of your first connect by returns output backwards. Also, I don't get how you get the last two rows in your final output. 4 is a parent of 5, not a child, so why does it show up? And if it isn't there, then the last line won't be as well.
If I am reading it correctly, you can use something like:
Which gives the following output:
The biggest thing is that the 2 tables were set up opposite of each other (organizations had a link to the parent, affiliations had a link to the child). So I am making them into the same format in the WITH clause, and then using the connect by on the combined set.
Also, for some reason Oracle gives the first loop a different level than the others since it is a self reference. I am assuming that if this is a problem, you can put in some custom logic for this case.
这是一个开始:
如果您添加子查询来获取剩余的关系,那么您应该可以顺利进行。
分享并享受。
Here's a start at it:
If you add the subqueries to get the remaining relationships you should be good to go.
Share and enjoy.
未经测试。首先创建一个视图以简化从 2 个表中提取数据的过程。
现在我们可以使用它来轻松迭代地找到所有有趣的组织。
在这种情况下,您甚至可以删除 related_recursive 的 relatedid 列,但它很有用
如果您想删除或更改 where 部分并从 related_recursive 选择 *,则这是必需的。
请记住,CTE 在主查询之前进行了全面评估,因此这可能会拉入许多页面
在主查询中最终过滤之前。
Untested. Create a view to simplify pulling data from your 2 tables first.
Now we can use that to iteratively find all interesting orgids easily.
You could even remove the relatedid column of related_recursive in this case, but it is useful
and necessary if you want to remove or change the where part and select * from related_recursive.
Just remember, CTEs are evaluated fully before the main query so this might pull in many pages
before eventual filtering in the main query.