Question

使用SQL Server 2008和使用＆＃39;今天＆＃39;值为12/5/2017用于临时数据目的。

我今天和一年前的今天（本周的同一天）拉动每家商店的总销售额。这就是我到目前为止所做的：

     Declare @LastYearToday datetime, @Today datetime

    -- @LastYearToday is business day on selected date, last year, same weekday
    set @Today = '2017-12-5'
    set @LastYearToday = Convert(date, (DATEADD(year, -1, getdate()+1))) 

    SELECT 

      StoreID, GrossSales, DF_BusinessDay

    FROM DayFileSummary 

    WHERE 
    DF_BusinessDay = @LastYearToday OR 
    DF_BusinessDay = @Today

    ORDER BY StoreID

我需要从去年的总销售额中扣除今天的总销售额，但我不确定如何继续。我是在SQL中执行此操作还是在报告中处理此操作？似乎报告需要一些逻辑来减去具有相同商店ID但不同日期的总销售额。我觉得我在想这个。

Answer 1

你可以这样做：

WITH CTE
AS
(

    SELECT  
      StoreID, 
      SUM(CASE WHEN DF_BusinessDay = @LastYearToday 
               THEN GrossSales ELSE 0 END) AS LastYearGrossSales
      SUM(CASE WHEN DF_BusinessDay = @Today 
               THEN GrossSales ELSE 0 END) AS TodayGrossSales
    FROM DayFileSummary 
    WHERE DF_BusinessDay = @LastYearToday OR  DF_BusinessDay = @Today
    GROUP BY  StoreID

)
SELECT StoreID, LastYearGrossSales - TodayGrossSales AS Result
FROM CTE;

或：使用UNION：

WITH CTE
AS
(
    SELECT  
      StoreID, SUM(GrossSales) AS LastYearGrossSales, 0  AS TodayGrossSales
    FROM DayFileSummary 
    WHERE DF_BusinessDay = @LastYearToday 
    GROUP BY  StoreID
    UNION ALL
    SELECT StoreID, 0 AS LastYearGrossSales, SUM(GrossSales) AS TodayGrossSales
    FROM DayFileSummary 
    WHERE DF_BusinessDay = @Today
)
SELECT StoreID, SUM(LastYearGrossSales) - SUM(TodayGrossSales) AS Result
FROM CTE
GROUP BY StoreID

SQL查询比较今天到去年的销售额

1 个答案: