每個日期的事件總數

Question

我被卡住開發一個查詢。

我有一個表，結構是這樣的：

[EventId] [Description] [EventName] [ValidFrom] [ValidTo] [Approved] 
1   Sample1  1stEvent  2013-01-27 2013-05-10  1 
2   Sample2  2stEvent  2013-04-07 2013-06-15  1 
3   Sample3  3stEvent  2013-04-07 2013-06-15  1 
4   Sample4  4stEvent  2013-03-02 2013-05-29  1 
5   Sample5  5stEvent  2013-05-17 2013-07-10  1 
6   Sample6  6stEvent  2013-03-20 2013-05-11  1 

我要的是一個日期範圍內的每個日期，包括事件的總數。

Select distinct 
    Convert(varchar,ValidFrom,101)as [Date], 
    case 
     when count(EventID)>1 then Convert(nvarchar, count(EventID)) +' Events' 
     else Convert(nvarchar, count(EventID)) + ' Event' 
     end as CountOf, 
    Row_Number() 
     over (Order By Convert(varchar,ValidFrom,101)) as RowNumber 
from [Table] 
where Approved=1 
group by Convert(varchar,ValidFrom,101) 

這是查詢我已經來了，直至現在，但是這顯示了在特定日期的事件的總數，而不包括其被繼續按照從有效和有效的日期之間的日期的事件。

Answer 1

這樣做：

declare @dateFrom date 
declare @dateTo date 
SET @dateFrom = '20130101' 
SET @dateTo = '20130501' 
;with cte as(Select @dateFrom AS EveryDay 
      UNION ALL 
      Select dateadd(dd, 1, EveryDay) FROM cte WHERE EveryDay < @dateTo) 
SELECT 
EveryDay, 
COUNT(DISTINCT [EventName]) AS NoEvents 
from cte LEFT JOIN Table1 ON ValidFrom <= EveryDay AND ValidTo >= EveryDay 
GROUP BY EveryDay 
OPTION (MAXRECURSION 0) 

SQL Fiddle

Answer 2

此代碼示例不完整 - 您需要輸入需要顯示和聚合的字段。這聽起來像你正在尋找一個在兩個日期之間的結果，而你在查詢中沒有。我不確定我是否完全明白你的問題。

DECLARE @pStartDate DATE 
DECLARE @pEndDate DATE 

SET @pStartDate = [enter your start date for the date range] 
SET @pEndDate = [enter your end date for the date range] 

SELECT 
    COUNT(EventId), 
    ValidFrom, 
    ValidTo 
FROM [Table] 
WHERE 
    ValidFrom >= @pStartDate 
    AND ValidTo <= @pEndDate 
    AND Approved = 1 
GROUP BY 
    ValidFrom, 
    ValidTo 

Answer 3

隨着我所提到的上述查詢給出的結果是這樣的： -

Date CountOf RowNumber 
01/27/2013 2 Events 1 
03/02/2013 1 Event   2 
04/07/2013 2 Events 3 
05/17/2013 1 Event   4 

正如你可以看到我得到的總的事件僅在所不希望特定日期的基礎。

我想要顯示的結果就像從2013年1月27日有效2013年1月27日生效，這意味着在日期= 2013-03-02的情況下，事件應該增加1或該日期活躍的事件數量，所以2013-03-02的結果應該是6個事件，我希望我可以呈現更好的圖片，但由於它的複雜性，它使我變得空白:(

Answer 4

SELECT t1.EventId,t1.Description,t1.EventName,t1.ValidFrom,t1.ValidTo,t1.Approved,SUM(TotalEvent) FROM 
    (SELECT EventId,Description,EventName,ValidFrom,ValidTo,Approved,COUNT(EventId) as Total 
    FROM TABLE 
    WHERE Approved='1' AND ValidFrom >=(DATE) AND ValidTO<=(DATE) 
    GROUP BY EventId,Description,EventName,ValidFrom,ValidTo,Approved) AS t1 
    LEFT JOIN 
    (SELECT EventId, COUNT(EventId) as TotalEvent 
    FROM TABLE 
    WHERE ValidFrom >=(DATE) AND ValidTO<=(DATE)) AS t2 
    ON t1.EventId=t2.EventId 
    Group by t1.EventId,t1.Description,t1.EventName,t1.ValidFrom,t1.ValidTo,t1.Approved 

希望這有助於你