Sql 递归查询（给定节点查所有父节点、所有子节点的方法）

淩亂°似流年 2024-02-05 12:06 9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