我试图从服务器资源管理器执行我全新的存储过程,我得到:
消息 8134,级别 16,状态 1,过程 duckbilledPlatypi,第 13 行遇到除以零错误。
这是涉及的行(13):
@Week1End Week1End,
...在更多情况下:
DECLARE
@Week1End datetime,
@Week2begin datetime
Select Ind.Description,
@BegDate BegDate,
@Week1End Week1End,
@Week1End Week2Begin,
@EndDate EndDate,
对于完整的披露/上下文,这是整个 SP,因为它现在存在:
CREATE PROCEDURE [dbo].[duckbilledPlatypi]
@Unit varchar(25),
@BegDate datetime,
@EndDate datetime
AS
DECLARE
@Week1End datetime,
@Week2begin datetime
Select Ind.Description,
@BegDate BegDate,
@Week1End Week1End,
@Week1End Week2Begin,
@EndDate EndDate,
SUM(CASE WHEN Ind.InvoiceDate BETWEEN @BegDate AND @Week1End THEN Ind.QtyShipped ELSE 0 END)
Week1Usage,
SUM(CASE WHEN Ind.InvoiceDate BETWEEN @Week2Begin AND @EndDate THEN Ind.QtyShipped ELSE 0 END)
Week2Usage,
SUM(CASE WHEN Ind.InvoiceDate BETWEEN @BegDate AND @Week1End THEN Ind.Price ELSE 0 END)
Week1Price,
SUM(CASE WHEN Ind.InvoiceDate BETWEEN @Week2Begin AND @EndDate THEN Ind.Price ELSE 0 END) -
SUM(CASE WHEN Ind.InvoiceDate BETWEEN @BegDate AND @Week1End THEN Ind.QtyShipped ELSE 0 END)
UsageVariance,
SUM(CASE WHEN Ind.InvoiceDate BETWEEN @Week2Begin AND @EndDate THEN Ind.QtyShipped ELSE 0 END) -
SUM(CASE WHEN Ind.InvoiceDate BETWEEN @BegDate AND @Week1End THEN Ind.Price ELSE 0 END)
PriceVariance,
(SUM(CASE WHEN Ind.InvoiceDate BETWEEN @Week2Begin AND @EndDate THEN Ind.QtyShipped ELSE 0
END) -
SUM(CASE WHEN Ind.InvoiceDate BETWEEN @BegDate AND @Week1End THEN Ind.Price ELSE 0 END) )
/ SUM(CASE WHEN Ind.InvoiceDate BETWEEN @BegDate AND @Week1End THEN Ind.Price ELSE 0 END)
PercentageOfPriceVariance
From InvoiceDetail Ind
Where Ind.Unit = @Unit
AND Ind.InvoiceDate BETWEEN @BegDate AND @EndDate
Group By Ind.Description
我的猜测是 @Week1End Week1End 失败了,因为它没有被赋予一个值,因此为空。我不知道我是否应该做这样的事情来防止 0s/nulls:
DECLARE
@Week1End datetime = BegDate + 6;
@Week2begin datetime = BegDate + 7;
...或类似的东西:
Select Ind.Description,
@BegDate BegDate,
@Week1End BegDate+6,
@Week2Begin BegDate+7,
@EndDate EndDate,
......或其他完全不同的东西。
正如您可能知道的那样,我不知道实际应该如何完成日期数学。真正需要的日期是:
Week1Begin is the "BegDate" the user provided as a parameter
Week1End needs to be six days after Week1Begin
Week2Begin needs to be seven days after Week1Begin
Week2End is the "EndDate" the user provided as a parameter
例如,如果用户在 BegDate 中输入“12/27/2015”,在 EndDate 中输入“1/6/2016”,则这些值需要为:
Week1Begin = 12/27/2015
Week1End = 1/2/2016
Week2Begin = 1/3/2016
Week2End = 1/6/2016 (week2 is only a four-day week in this case, due to what the user entered)
我应该怎么做才能确保这里没有 div by zeros?