某些时期的摘要字段值

Question

在一张表中，我在某段时间（五年）内有货币汇率。在另一张表中，我计算了数据。 我有任务。我需要从连接表的每周摘要中获取统计信息 我现在正在这样做：

DECLARE @Category_RentHouse INT = 3;
DECLARE @Category_Parents INT = 5;
DECLARE @Category_Salary INT = 9;
DECLARE @TestDateStart DATE = '2012-01-01';
DECLARE @TestDateFinish DATE = '2012-01-07';
select Weeks, SUM(Cash_Usd) TotalMoney
from (select CAST(RateDate AS DATE) Weeks, 
       CASE  WHEN CategoryID = @Category_RentHouse THEN (TransactionAmount*(-1))
             WHEN CategoryID = @Category_Parents THEN TransactionAmount
             WHEN CategoryID = @Category_Salary THEN CAST((TransactionAmount / 
   RateValue) AS MONEY)
           ELSE CAST((TransactionAmount*(-1) / RateValue) AS MONEY)
END AS Cash_Usd
FROM (select * from Marathon.dbo.Transactions T 
LEFT JOIN IntermediateM.dbo.Rates R ON T.TransactionDate = R.RateDate) Y
    ) RR
WHERE Weeks BETWEEN @TestDateStart AND @TestDateFinish
GROUP BY DATEPART(week, Weeks), Weeks
ORDER BY Weeks

运行这个小代码的结果是

但如果在字段Weeks和TotalSumm中我会得到下一个字段会更好：

Weeks               TotalSumm
2012-01-07          -552...
2012-01-14          ....

Answer 1

我认为您只需修复select和group by：

SELECT MIN(Dte) as Weeks, SUM(Cash_Usd) TotalMoney
FROM (SELECT CAST(RateDate AS DATE) as Dte, 
             (CASE WHEN CategoryID = @Category_RentHouse THEN (TransactionAmount*(-1))
                   WHEN CategoryID = @Category_Parents THEN TransactionAmount
                   WHEN CategoryID = @Category_Salary THEN CAST((TransactionAmount / RateValue) AS MONEY)
                   ELSE CAST((TransactionAmount*(-1) / RateValue) AS MONEY)
              END) AS Cash_Usd
      FROM Marathon.dbo.Transactions T LEFT JOIN
           IntermediateM.dbo.Rates R
           ON T.TransactionDate = R.RateDate
      WHERE Weeks BETWEEN @TestDateStart AND @TestDateFinish
     ) RT
GROUP BY DATEPART(week, Weeks)
ORDER BY Weeks