Question

我的项目中有一个存储过程，它返回从今天到即将到来的49天的金额总和。我想以一种将2014-01-01作为开始日期并从该日期返回数据的方式修改此存储过程。例如，

Total_amount     StartDate    EndDate
50000           2014-01-01    2014-02-18
40000           2014-02-19    2014-04-08

这是我的存储过程，

USE [myDB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:      <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
ALTER PROCEDURE [dbo].[my_sp] 

AS
BEGIN
    select sum(amount) as Total_amount,
           getdate() as StartDate,
           dateadd(dd, 48, dateadd(dd, -(datepart(dw, getdate())-2), getdate())) as EndDate
    from   my_table
    where  Col_Date > dateadd(dd, -1, getdate())
           and Col_Date < dateadd(dd, 49, dateadd(dd, -(datepart(dw, getdate())-2), getdate()))
END

任何帮助都将不胜感激。

感谢。

Answer 1

getdate（）函数返回今天的日期。因此，您可以将其更改为例如＆＃39; 2014-01-01＆＃39;。

Answer 2

如果我理解正确，您想知道如何在存储过程中添加日期参数。然后，您希望在过程中使用提供的日期而不是今天的日期。

这不难做到：

ALTER PROCEDURE [dbo].[my_sp] (@startdate datetime)

AS
BEGIN
    select sum(amount) as Total_amount,@startdate as StartDate,dateadd(dd,48,dateadd(dd,-(datepart(dw,@startdate)-2),@startdate)) as EndDate
    from my_table
    where Col_Date > dateadd(dd,-1,@startdate)
      and Col_Date < dateadd(dd,49,dateadd(dd,-(datepart(dw,@startdate)-2),@startdate))
END

Answer 3

据我所知，必须是这样的：

ALTER PROCEDURE [dbo].[my_sp] 

AS
BEGIN
    select sum(amount) as Total_amount,
           getdate() as StartDate,
           dateadd(dd, 48, dateadd(dd, -(datepart(dw, getdate())-2), getdate())) as EndDate
    from   my_table
    where  Col_Date > '2014-01-01'
END

Answer 4

这是基于我更好地理解你的目标的另一种方法。我使用公用表表达式来设置一个表格，提供49天的桶和＃39;然后加入该列表以总结相应的总数。

ALTER PROCEDURE [dbo].[my_sp] (@startdate datetime)

AS

BEGIN
-------------------------
-- Set up a table that lists off 49 day periods starting from @startDate
-------------------------

DECLARE @endDate DATETIME  = getdate(); 

WITH [dates] ([startDate], [maxDate_Excluded]) AS 
   (SELECT 
          @startDate AS [startDate] 
          ,DATEADD(d, 49, @startDate) AS [maxDate_Excluded] 

    UNION ALL 
    SELECT 
          DATEADD(d, 49, [startDate]) AS [startDate] 
          ,DATEADD(d, 98, [startDate]) AS [maxDate_Excluded]
    FROM [dates] 
    WHERE [startDate] < @endDate
) 
, dateFrame AS
( 
    SELECT 
          [startDate] 
          ,[maxDate_Excluded]

    FROM [dates] 
)


-------------------------
-- JOIN and sum.
-------------------------
SELECT
    [startDate]
    , dateadd(d, -1, [maxDate_Exclued]) as endingDate
    , Sum(amount) as total_amount
FROM
    dateFrame df

    left join my_table mt
        on mt.col_date >= df.startDate
        and mt.col_date < df.maxDate_Excluded
GROUP BY
    [startDate]
    ,[maxDate_Excluded]
ORDER by
    [startDate]

END

如何在存储过程中设置自定义日期和操作数据？

4 个答案: