T-Sql 递归查询（给定节点查所有父节点、所有子节点的方法）

野性酷女 2024-02-18 17:00 17阅读 0赞

\-- 查找所有父节点  
with tab as  
(  
select Type\_Id,ParentId,Type\_Name from Sys\_ParamType\_V2\_0 where Type\_Id=316--子节点  
union all  
select b.Type\_Id,b.ParentId,b.Type\_Name  
from  
tab a,--子节点数据集  
Sys\_ParamType\_V2\_0 b --父节点数据集  
where a.ParentId=b.Type\_Id --子节点数据集.parendID=父节点数据集.ID  
)  
select \* from tab;

\-- 查找所有子节点  
with tab as  
(  
select Type\_Id,ParentId,Type\_Name from Sys\_ParamType\_V2\_0 where Type\_Id=1--父节点  
union all  
select b.Type\_Id,b.ParentId,b.Type\_Name  
from  
tab a,--父节点数据集  
Sys\_ParamType\_V2\_0 b--子节点数据集  
where b.ParentId=a.Type\_Id --子节点数据集.ID=父节点数据集.parendID  
)  
select \* from tab;

\--查找从子节点到定级节点的路径  
with tab as  
(  
select Type\_Id,ParentId,Type\_Name,cast(Type\_Id as varchar(100)) as fulltypeid  
from SKU\_ProductType where Type\_Id=423--子节点  
union all  
select  
b.Type\_Id,b.ParentId,b.Type\_Name,  
cast(a.fulltypeid+','+cast(b.Type\_Id as nvarchar(100)) as varchar(100)) as fulltypeid  
from  
tab a,--子节点数据集  
SKU\_ProductType b --父节点数据集  
where a.ParentId=b.Type\_Id --子节点数据集.parendID=父节点数据集.ID  
)  
select \* from tab ;

\--------------结果--------------  
423 410 蜂花粉 423  
410 347 蜂产品 423,410  
347 5 营养食品 423,410,347  
5 0 健康保健 423,410,347,5

转载保留:http://write.blog.csdn.net/postedit/7869241