Sql 有没有更好的方法来确定序列模式的时间间隔边界？

我有一个付款表，有正值和负值，即捕获和信用。我需要确定自上次净正金额以来，我们收到净正金额的点。例如，如果客户支付这些款项并收到这些信用证：

01/01  $100 <-
02/01 -$100
03/01 -$100
04/01  $100
05/01  $100
06/01  $100 <-

然后，我放弃NetCaptures为$0或更少的记录，重新计算开始日期，重新计算NetCaptures，然后重复，直到没有可删除的记录为止，保留此项

Start      End        NetCaptures
1900/01/01 2011/01/01  $100
2011/01/02 2011/06/01  $100

有更好的方法吗？分析表达式的一些巧妙用法？这正接近RBAR。在实践中，对于500K记录，它运行10分钟的速度是可以接受的，而在我开始用这种方式计算学分之前，它的运行速度是1.5分钟

*结果*

虽然Microsoft确实支持一个优雅的滚动总计功能，但基于这种想法，我最终得到了这样的代码：计算所有捕获，计算每个捕获的运行总计，并丢弃那些具有相等或更大运行总计的早期记录

CREATE TABLE #Sequences
    (
    OrderID INT NOT NULL,
    Sequence    INT NOT NULL,
    PRIMARY KEY (OrderID, Sequence),
    StartDate   DATE NOT NULL DEFAULT '1900-01-01',
    EndDate DATE NOT NULL,
    CapturesThisPeriod  DECIMAL(18, 2) NOT NULL DEFAULT 0.00,
    )
INSERT INTO #Sequences (OrderID, Sequence, EndDate)
    SELECT OrderID, ROW_NUMBER() OVER (PARTITION BY OrderID ORDER BY DateReceived), DateReceived
    FROM Receipts
    WHERE Amount > 0.00

/* Calculate the start date for each period */
UPDATE S
SET StartDate = DATEADD(D, 1, Prev.EndDate)
FROM
    #Sequences AS S
    INNER JOIN #Sequences AS Prev ON S.OrderID = Prev.OrderID AND Prev.Sequence = S.Sequence - 1

/* Calculate the cumulative total for each period */
UPDATE M
SET CumulativeReceipts = R.Receipts
FROM
    #Sequences AS M
    INNER JOIN      
        (
        SELECT
            M.OrderID, M.Sequence, SUM(R.Amount) AS Receipts
        FROM
            #Sequences AS M
            INNER JOIN Receipts AS R ON M.OrderID = R.OrderID AND R.DateReceived <= M.EndDate
        GROUP BY
            M.OrderID, M.Sequence
        ) AS R ON M.OrderID = R.OrderID AND M.Sequence = R.Sequence

/* Delete sequences with do not represent net positive receipts */
DELETE FROM M
FROM #Sequences AS M
WHERE EXISTS (SELECT * FROM #Sequences AS Prev WHERE M.OrderID = Prev.OrderID AND Prev.Sequence < M.Sequence AND Prev.CumulativeReceipts >= M.CumulativeReceipts)

/* Recalculate sequence numbers and dates */
UPDATE S SET Sequence = NewSequence FROM (SELECT Sequence, ROW_NUMBER() OVER (PARTITION BY OrderID ORDER BY Sequence) AS NewSequence FROM #Sequences) AS S
UPDATE S
SET StartDate = DATEADD(D, 1, Prev.EndDate)
FROM
    #Sequences AS S
    INNER JOIN #Sequences AS Prev ON S.OrderID = Prev.OrderID AND Prev.Sequence = S.Sequence - 1
    END

/* Calculate net captures per period, and continue with analysis */

---

搜索运行总和；例如，

搜索运行总和；例如，您是说您想要曲线的局部峰值吗？当曲线上升到先前的最大值以上时？或者你对曲线何时上升到零以上感兴趣？@Andomar，我相信这正是我需要的！如果你想加上这个作为回答，我会把它标记为接受。我知道那必须是一种更简单的方法。我将在代码实现后发布代码@Lasse，根据总成绩，我在寻找零分以上的所有分数。我被困在实现单位价值上，我不认为要从累计总量开始，然后从那个里开始回溯。若微软实现按订单计算的总和，这将很容易。

CREATE TABLE #Sequences
    (
    OrderID INT NOT NULL,
    Sequence    INT NOT NULL,
    PRIMARY KEY (OrderID, Sequence),
    StartDate   DATE NOT NULL DEFAULT '1900-01-01',
    EndDate DATE NOT NULL,
    CapturesThisPeriod  DECIMAL(18, 2) NOT NULL DEFAULT 0.00,
    )
INSERT INTO #Sequences (OrderID, Sequence, EndDate)
    SELECT OrderID, ROW_NUMBER() OVER (PARTITION BY OrderID ORDER BY DateReceived), DateReceived
    FROM Receipts
    WHERE Amount > 0.00

/* Calculate the start date for each period */
UPDATE S
SET StartDate = DATEADD(D, 1, Prev.EndDate)
FROM
    #Sequences AS S
    INNER JOIN #Sequences AS Prev ON S.OrderID = Prev.OrderID AND Prev.Sequence = S.Sequence - 1

/* Calculate the cumulative total for each period */
UPDATE M
SET CumulativeReceipts = R.Receipts
FROM
    #Sequences AS M
    INNER JOIN      
        (
        SELECT
            M.OrderID, M.Sequence, SUM(R.Amount) AS Receipts
        FROM
            #Sequences AS M
            INNER JOIN Receipts AS R ON M.OrderID = R.OrderID AND R.DateReceived <= M.EndDate
        GROUP BY
            M.OrderID, M.Sequence
        ) AS R ON M.OrderID = R.OrderID AND M.Sequence = R.Sequence

/* Delete sequences with do not represent net positive receipts */
DELETE FROM M
FROM #Sequences AS M
WHERE EXISTS (SELECT * FROM #Sequences AS Prev WHERE M.OrderID = Prev.OrderID AND Prev.Sequence < M.Sequence AND Prev.CumulativeReceipts >= M.CumulativeReceipts)

/* Recalculate sequence numbers and dates */
UPDATE S SET Sequence = NewSequence FROM (SELECT Sequence, ROW_NUMBER() OVER (PARTITION BY OrderID ORDER BY Sequence) AS NewSequence FROM #Sequences) AS S
UPDATE S
SET StartDate = DATEADD(D, 1, Prev.EndDate)
FROM
    #Sequences AS S
    INNER JOIN #Sequences AS Prev ON S.OrderID = Prev.OrderID AND Prev.Sequence = S.Sequence - 1
    END

/* Calculate net captures per period, and continue with analysis */