递归 CTE：父子关系

如何解决递归 CTE：父子关系

有没有一种方法可以让我使用递归函数而不去到树的末尾？ 例如：

假设我有一个像下面这样的简单树

对于每个节点，我想查看当前节点下已经计算的分数，并在其当前权重中使用它

Node score = (Current Kr)* (Current Weight) + (Next Node Already Computed score) *(Next Node Weight)
              -------------------------------------------------------------------------------------
                                        CurrentWeight + Next Node Weight

代码：

CREATE TABLE TreeTable(
   Teamid           INTEGER  NOT NULL PRIMARY KEY,ParentId         INTEGER,Name             VARCHAR(255) NOT NULL,ParentName       VARCHAR(255),TeamRollupType             VARCHAR(17) NOT NULL,KR INTEGER  NOT NULL,TeamWeight INTEGER NOT NULL
);
INSERT INTO TreeTable(Teamid,ParentId,Name,ParentName,TeamRollupType,KR,TeamWeight) VALUES (1,NULL,'Team1','Current and Child',70,8);
INSERT INTO TreeTable(Teamid,TeamWeight) VALUES (2,1,'Team1A',98,1);
INSERT INTO TreeTable(Teamid,TeamWeight) VALUES (3,2,'Team1B',26,5);


select * from TreeTable;

树表结果：

尝试：我正在做的代码一直持续到最后一个节点

 with rcte as
(
  select 
         t.TeamID as GroupID,t.Name as GroupName,t.TeamRollupType as GroupType,t.TeamId,t.Name,t.TeamRollupType,--Value
         case t.TeamRollupType
           when 'Child List' then 0 
           when 'ChildAndLinkedLists' then 0 -- if the current node must be ignored,then the current value changes to 0
           else t.KR
         end as Value,--Weight
         case t.TeamRollupType
           when 'Child List' then 0 
           when 'ChildAndLinkedLists' then 0-- if the current node must be ignored,then the current value changes to 0
           else t.TeamWeight
         end as WeightValue,--Value*Weight
         Weightedscore=
         case t.TeamRollupType
           when 'Child List' then 0 
           when 'ChildAndLinkedLists' then 0-- if the current node must be ignored,then the current value changes to 0
           else t.KR
         end 
         *
         case t.TeamRollupType
           when 'Child List' then 0
           when 'ChildAndLinkedLists' then 0-- if the current node must be ignored,then the current value changes to 0
           else t.TeamWeight
         end 
        

  from  treetable t
union all
  select 
         r.GroupID,r.GroupName,r.GroupType,--TeamRollupType
         case r.TeamRollupType
           when 'Current List' then 'Current List' -- if the parent was the end of the sum,then it stays the end of the sum
           else t.TeamRollupType
         end,--Value
         case
           when r.TeamRollupType = 'Current List' then 0 -- if the parent was the end of the sum,then the current value changes to 0
           when t.TeamRollupType = 'Child List' then 0 
           when t.TeamRollupType ='ChildAndLinkedLists' then 0-- if the current node must be ignored,then the current value changes to 0
           else t.KR
         end,--TeamWeight
         case
           when r.TeamRollupType = 'Current List' then 0 -- if the parent was the end of the sum,then the current value changes to 0
           when t.TeamRollupType = 'Child List' then 0 -- if the current node must be ignored,then the current value changes to 0
           when t.TeamRollupType ='ChildAndLinkedLists' then 0
           else t.TeamWeight
         end,--Teamweight*Value
         case
           when r.TeamRollupType = 'Current List' then 0 -- if the parent was the end of the sum,then the current value changes to 0
           when t.TeamRollupType ='ChildAndLinkedLists' then 0
           else t.KR

         end 
         *
         case
           when r.TeamRollupType = 'Current List' then 0 -- if the parent was the end of the sum,then the current value changes to 0
           when t.TeamRollupType ='ChildAndLinkedLists' then 0
           else t.TeamWeight
         end

  from rcte r
  join treetable t
    on t.ParentId = r.TeamId 
)
select r.GroupName,sum(r.weightedscore)/SUM(CASE When r.Value <> 0 Then r.WeightValue Else 0 End ) as Groupscore,string_agg(case when r.Value <> 0 then convert(nvarchar(255),r.Value) end,'+') as GroupSumFormula,r.Name) end,'+') as GroupSumTeam,r.WeightValue) end,'+') as GroupSumWeight
       --string_agg(case when r.Value <> 0 then convert(nvarchar(255),r.weightedscore) end,'+') as GroupSumrweightedscore,--   sum(r.Value) as GroupSum,--SUM(CASE When r.Value <> 0 Then r.WeightValue Else 0 End ) as TotalWeight,--sum(r.weightedscore) as GroupWeightedSum
       

from rcte r
group by r.GroupName
order by r.GroupName;

结果：