Total number of Events on every date - sql

Question

I am stuck developing a query.
I have a table, structured like this:
[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
What i want is the total number of events for every date within a date range, inclusive.
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)
This is the query I have come up with until now, but this shows the total number of events on a particular date without including the events which were continued as per the dates between valid from and valid to dates.

Answer 1

This code sample is not complete - you need to enter the fields you need to display and aggregate upon. It sounds like you're looking for a result that's between two dates, and you don't have that in your query. I'm not sure I comletely understand your question.
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 2

This will do:
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 3

With the above Query i have mentioned gives the result like this :-
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
As you can see i am getting total events only on the base of particular date which is not desired.
i want to show the result as like in valid from =01/27/2013 in valid to 2013-05-10 which means in the case of Date =2013-03-02 the events should be incremented by one or the number of events which are active on that date,so the result for 2013-03-02 should be 6 events, i wish i can present a better picture but because of the complexity it made me blank :(

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
Hope this help you.