排除周六周日的功能

Question

我创建了一个“每日销售查询”，用于捕获从周一至周五上午 8 点运行的前一个工作日输入的所有总销售额。

问题是，如果今天是星期一，我如何捕获星期五的记录。 这样我就可以排除周末了。

因为如果是星期一，总销售额显示为 0，这实际上是有意义的，因为星期日不是工作日。请帮忙。

查看我当前的代码：

SELECT 
    CONVERT(VARCHAR, DATEADD(dd, - 1, GETDATE()), 103) AS Date, 
    'Sales Orders' AS Type, 
    COUNT(o.SalesOrderID) AS Orders, 
    SUM(d.QtyOrdered) AS Chairs, 
    ISNULL(ROUND(SUM(d.ExtendedPrice), 2), 0) AS [Total Ex GST] 
FROM 
    dbo.SalesOrder o
LEFT OUTER JOIN 
    dbo.SalesOrderDetails d ON o.SalesOrderID = d.SalesOrderID 
WHERE 
    (o.EntryDate >= CONVERT(CHAR(8), DATEADD(dd, - 1, GETDATE()), 112)) 
    AND (o.EntryDate < CONVERT(CHAR(8), GETDATE(), 112)) 
    AND (o.CustomerID <> 187);

Answer 1

您可以使用datediff(dd,0,getdate()) % 7 = 0 来确定当前日期是否为星期一，而不考虑任何其他服务器设置（这是因为 SQL Server 中的零日期是 1900-01-01，恰好是星期一）。

declare @start date;
declare @finish date;

set @start = dateadd(dd, case when datediff(dd,0,getdate()) % 7 = 0 then -3 else -1 end, getdate());
set @finish = dateadd(dd,1,@start);

select
    @start, datename(weekday,@start)
  , @finish, datename(weekday,@finish)
  , datename(weekday,getdate())
;

所以在你的查询中我会使用：

declare @start date;
declare @finish date;

set @start = dateadd(dd, case when datediff(dd,0,getdate()) % 7 = 0 then -3 else -1 end, getdate());
set @finish = dateadd(dd,1,@start);

SELECT 
    CONVERT(VARCHAR, @start, 103) AS Date, 
    'Sales Orders' AS Type, 
    COUNT(o.SalesOrderID) AS Orders, 
    SUM(d.QtyOrdered) AS Chairs, 
    ISNULL(ROUND(SUM(d.ExtendedPrice), 2), 0) AS [Total Ex GST] 
FROM 
    dbo.SalesOrder o
LEFT OUTER JOIN 
    dbo.SalesOrderDetails d ON o.SalesOrderID = d.SalesOrderID 
WHERE 
     o.EntryDate >= @start
    AND o.EntryDate < @finish
    AND o.CustomerID <> 187
;

Answer 2

如果您使用 case 语句来确定您需要过去多少天，例如

dateadd(dd, case when datepart(weekday,getdate()) = 1 then -3 else -1 end, getdate()) -- StartDate
dateadd(dd, case when datepart(weekday,getdate()) = 1 then -2 else 0 end, getdate()) -- EndDate

所以你的代码看起来像

SELECT 
    CONVERT(VARCHAR, dateadd(dd, case when datepart(weekday,getdate()) = 1 then -3 else -1 end, getdate()), 103) AS Date, 
    'Sales Orders' AS Type, 
    COUNT(o.SalesOrderID) AS Orders, 
    SUM(d.QtyOrdered) AS Chairs, 
    ISNULL(ROUND(SUM(d.ExtendedPrice), 2), 0) AS [Total Ex GST] 
FROM 
    dbo.SalesOrder o
LEFT OUTER JOIN 
    dbo.SalesOrderDetails d ON o.SalesOrderID = d.SalesOrderID 
WHERE 
    (o.EntryDate >= CONVERT(CHAR(8), dateadd(dd, case when datepart(weekday,getdate()) = 1 then -3 else -1 end, getdate()), 112)) 
    AND (o.EntryDate < CONVERT(CHAR(8), dateadd(dd, case when datepart(weekday,getdate()) = 1 then -2 else 0 end, getdate()), 112)) 
    AND (o.CustomerID <> 187);

PS：请确认您服务器上的工作日 1 是星期一。