Question

更新：我想要做的一个例子：

现有表格：

1st Table name: DistinctAcctDay;
Column name: ID int, AccountingDate datetime;
Values: (1, 2017/05/01);
     (2, 2017/08/01);
     (3, 2017/09/01);


2nd Table name: TransferOut;
Column name: AccountingDate datetime; Amount decimal;
Values: (2017/01/01, 10);
(2017/02/01, 13);
(2017/06/25, 15);
(2017/08/03, 18);
(2017/08/08, 30);

我想让Cosmos脚本返回3以下（或n，取决于第1个表中存在多少行）输出当天之前所有历史数据的总和：

1）第1表中2017/05/01之前的第2表中的金额：数字应为23;

2）第一张表中2017/08/01之前的第二张表中的金额：数字应为10 + 13 + 15 = 38;

3）第1表中2017/09/01之前的第2表中的金额：数字应为10 + 13 + 15 + 18 + 30 = 86;

脚本应该用Cosmos编写。

提前感谢每个人的帮助。

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我的想法：

我想在第一个循环并每次选择一行（一个日期）并使用该日期作为从第二个表中导出数据的标准。

如果用sql编写，它可能如下所示。

Declare @Counter int,@MaxRowLimit int; 
Set @Counter =1;
Set @MaxRowLimit = (SELECT COUNT(*) FROM DistinctAcctDay);
WHILE @Counter <= @MaxRowLimit
BEGIN
  PickAcctDay=
  SELECT AccountingDay
  FROM DistinctAcctDayId
  WHERE ID =@Counter;

  TransferOut =
     SELECT SUM(Amount) FROM TransferOut
     WHERE AccountingDate <= PickAcctDay;   
   SET @Counter =@Counter +1
END

然而，它需要用USQL编写，我不熟悉USQL，也不熟悉C＃。我写了下面的内容（这是不正确的）并且我被卡住了......

int counter=1; int MaxRowLimit;
for (counter = 1; counter <= MaxRowLimit; counter++)
{
  DateTime PickAcctDay =
  SELECT AccountingDay
  FROM DistinctAcctDayId
  WHERE ID ==@Counter;

  TransferOut =
     SELECT SUM(Amount) FROM TransferOut
     WHERE AccountingDate <= PickAcctDay;
}

Answer 1

@DistinctAcctDay = 
SELECT * FROM 
    ( VALUES
    (1, new DateTime(2017,05,01)),
    (2, new DateTime(2017,08,01)),
    (3, new DateTime(2017,09,01))
    ) AS T(Id, AccountingDate);


@TransferOut = 
SELECT * FROM 
    ( VALUES
    (new DateTime(2017,01,01), 10),
    (new DateTime(2017,02,01), 13),
    (new DateTime(2017,06,25), 15),
    (new DateTime(2017,08,03), 18),
    (new DateTime(2017,08,08), 30)
    ) AS T(AccountingDate, Amount);

@result = 
       SELECT d.Id, SUM(Amount) AS sumAmount
       FROM  @DistinctAcctDay AS d
       CROSS JOIN @TransferOut AS t
       WHERE d.AccountingDate >= t.AccountingDate 
      // WHERE d.AccountingDate BETWEEN t.AccountingDate AND d.AccountingDate
       GROUP BY d.Id;

如何在Microsoft Cosmos Scope中编写循环以逐行处理？

1 个答案: