用最快的算法计算资产负债表

Question

我正在实施会计软件。

在计算分层自引用主题的资产负债表时，请告诉我最快的算法

这些是我的桌子：

主题表：

TopicID nvarchar(50) -- is Parent Field
ParentID nvarchar(50) -- is Child Field
Description nvarchar(512) 
------------DocumentDetal table
DocumentNumber nvarchar(50)
TopicFK nvarchar(50)  
Debit decimal(18,0)
Credit decimal(18,0)

两个表与TopicID 和TopicFK 列相关，请告诉我如何使用SQL 存储过程计算资产负债表。

以下是数据样本：

以下是文档：

其实我想要以下计算结果：

Answer 1

为您的SQL Server 2008 R2，这里是sumDebit and sumCredit。不明白如何计算 Res Debit and Res credit，但我认为您也可以编辑以获取您的 Res value。

无论如何，这是使用CTE 感谢Mikael Eriksson in Recursive sum in tree structure

with T as
(   
    select t.TopicID, t.ParentID, sum(d.Debit) as sumDebit, sum(d.Credit) as sumCredit
    from Topics t
    left join DocumentDetail d 
    on t.TopicID = d.TopicFK
    group by t.TopicID, t.ParentID
)
,C as
(
    select T.TopicID,
         T.sumDebit,
         T.sumCredit,
         T.TopicID as RootID
    from T
    union all
    select T.TopicID,
         T.sumDebit,
         T.sumCredit,
         C.RootID
    from T
    inner join C 
    on T.ParentId = C.TopicID
)
select T.TopicID,
       T.ParentId,
       S.sumDebitIncludingChildren sumDebit,
       S.sumCreditIncludingChildren sumCredit
from T
  inner join (
             select RootID,
                    sum(sumDebit) as sumDebitIncludingChildren,
                    sum(sumCredit) as sumCreditIncludingChildren
             from C
             group by RootID
             ) as S
    on T.TopicID = S.RootID
order by T.TopicID
option (maxrecursion 0);

在SQL Fiddle 中测试正常