T-Sql 递归查询（给定节点查所有父节点、所有子节点的方法）

-- 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

实际

WITH tree AS(
      SELECT ID,PID,0 as level,cast(ID as varchar(1000)) fullid,CAST(AREA_NAME as varchar(1000)) fullname
      FROM YUN_BASE_AREA
      WHERE PID='0'

      UNION ALL
      SELECT child.ID,child.PID,parent.level+1,cast(fullid+','+child.ID as varchar(1000)) fullid,cast(fullname+'>'+child.AREA_NAME as varchar(1000)) fullid
      FROM YUN_BASE_AREA as child
      inner join tree parent 
      on parent.ID=child.PID
    )
SELECT * FROM tree order by fullname

select * from YUN_BASE_AREA where AREA_NAME='亚洲'

结果