内部连接重复

Question

我正在尝试自己加入一个表，然后在 4 周内求和。 下面是样本数据

锡	方向	数量	B_日期	交易ID
106	现金	8750	2021-07-06	182
106	现金	8750	2021-08-05	183

当我试图在 4 周内将同一 TIN 的所有金额与自身连接起来时。 我得到一个重复的行。 根据表格总和应该是 17500，但我得到的总和是 26250。下面是我开发的代码

Select 
    sub.TIN as TIN,
    sub.Direction as Direction,
    sum(sub.amount) as Sum_Amt,
    min(sub.B_Date) as From_Date,
    max(sub.B_Date) as To_Date
from ind_cash_trnx_cond_tin main
join ind_cash_trnx_cond_tin sub on main.TIN = sub.TIN
    and main.B_Date <= sub.B_Date
    and DATEDIFF(wk,main.B_Date,sub.B_Date) <=4
    and sub.TIN = '10627503'
group by sub.TIN, sub.Direction

Output

锡	方向	Sum_amount	从日期	迄今为止
106	现金	26250	2021-07-06	2021-08-05

我累了检查，发现有一个重复的行。 下面是代码

Select 
    sub.TIN as TIN,
    sub.Direction as Direction,
    sub.amount,
    sub.B_Date,
    sub.TransactionID
from ind_cash_trnx_cond_tin main
join ind_cash_trnx_cond_tin sub on main.TIN = sub.TIN
    and main.B_Date <= sub.B_Date
    and DATEDIFF(wk,main.B_Date,sub.B_Date) <=4

output

锡	方向	数量	B_日期	交易ID
106	现金	8750	2021-07-06	182
106	现金	8750	2021-08-05	183
106	现金	8750	2021-08-05	183

所需的 output 如下

锡	方向	Sum_amount	从日期	迄今为止
106	现金	17500	2021-07-06	2021-08-05

谢谢！

Answer 1

应该是这样吗？

输入和 Output

代码：

Select 
    sub.TIN as TIN,
    sub.Direction as Direction,
    sum(sub.amount) as Sum_Amt,
    min(sub.B_Date) as From_Date,
    max(sub.B_Date) as To_Date
from ind_cash_trnx_cond_tin main
INNER join ind_cash_trnx_cond_tin sub on main.TIN = sub.TIN
    and main.B_Date = sub.B_Date
    and DATEDIFF(wk,main.B_Date,sub.B_Date) <=4
   -- and sub.TIN = '10627503'
group by sub.TIN,
    sub.Direction,
    sub.amount

Answer 2

如果“4 周内”的意思是“从现在开始的最后 4 周”，那么以下查询将执行以下操作：

select TIN as TIN,
       Direction as Direction,
       sum(amount) as Sum_Amt,
       min(B_Date) as From_Date,
       max(B_Date) as To_Date
  from ind_cash_trnx_cond_tin
 where DATEDIFF(wk, B_Date, getdate()) > 4

或者，如果您需要滚动总计，那么您将使用以下技术