SQL Grouping and DATEDIFF Issue - sql

Question

The query below is using Axosoft's OnTime DB with a few custom fields. If you ignore the custom fields and have some sample data this should work.
What I'm trying to do:
Return a query that has a count(total) number of open tickets that have been open during these time frames:
Less than a day
1 Day
2 Days
3 Days
4 Days
5 Days
6 Days
More than a week
this is for a ticket aging query. Here's the query below:
DECLARE #endDate DateTime;
SET #endDate = '03/18/2011';
WITH
WorkItems AS
(
SELECT
i.ProjectID AS ProjectID,
CASE WHEN ic.Custom_279 = 'Bug' THEN 'Issue' WHEN ic.Custom_279 IS NULL THEN 'Other' WHEN LTRIM(RTRIM(ic.Custom_279)) = '' THEN 'Other' ELSE ic.Custom_279 END AS WorkItemType,
i.IncidentNumber AS ID,
i.Name AS Name,
--CASE WHEN ic.Custom_264 < '1901-01-01' THEN NULL ELSE ic.Custom_264 END AS DateReported,
CASE WHEN i.CreatedDateTime < '1901-01-01' THEN NULL ELSE i.CreatedDateTime END AS DateReported,
CASE WHEN ic.Custom_265 < '1901-01-01' THEN NULL ELSE ic.Custom_265 END AS DateResolutionBegan,
CASE WHEN ic.Custom_266 < '1901-01-01' THEN NULL ELSE ic.Custom_266 END AS DateSignoffRequested,
CASE WHEN ic.Custom_267 < '1901-01-01' THEN NULL ELSE ic.Custom_267 END AS DateClosed
FROM
dbo.Incidents AS i
INNER JOIN dbo.IncidentCustomFields AS ic ON ic.IncidentID = i.IncidentID
WHERE
i.Archived = 0
),
ProjectDescendantsIncludingSelf AS
(
SELECT
p.ProjectID AS ProjectID,
p.ProjectID AS DescendantProjectID,
CAST('/' + p.Name AS NVARCHAR) AS ProjectPath
FROM
dbo.Projects AS p
UNION ALL
SELECT
pd.ProjectID AS ProjectID,
p.ProjectID AS DescendantProjectID,
CAST(pd.ProjectPath + N'/' + p.Name AS NVARCHAR) AS ProjectPath
FROM
ProjectDescendantsIncludingSelf AS pd
INNER JOIN dbo.Projects AS p ON p.ParentID = pd.DescendantProjectID
),
OpenTicketsLessThanDay AS
(SELECT
COUNT(ID) AS [LessThanDayTicketCount],
CASE WHEN DATEDIFF(DAY, DateReported, #endDate) < 1 THEN DATEDIFF(DAY, DateReported, #endDate) ELSE NULL END AS [LessThanDay],
--CASE WHEN (DATEDIFF(DAY, DateReported, #endDate) > 1) AND (DATEDIFF(DAY, DateReported, #endDate) <= 2) THEN DATEDIFF(DAY, DateReported, #endDate) ELSE NULL END AS [GreaterThan1Day],
--CASE WHEN (DATEDIFF(DAY, DateReported, #endDate) > 2) AND (DATEDIFF(DAY, DateReported, #endDate) <= 3) THEN DATEDIFF(DAY, DateReported, #endDate) ELSE NULL END AS [GreaterThan2Days],
--CASE WHEN (DATEDIFF(DAY, DateReported, #endDate) > 3) AND (DATEDIFF(DAY, DateReported, #endDate) <= 4) THEN DATEDIFF(DAY, DateReported, #endDate) ELSE NULL END AS [GreaterThan3Days],
--CASE WHEN (DATEDIFF(DAY, DateReported, #endDate) > 4) AND (DATEDIFF(DAY, DateReported, #endDate) <= 5) THEN DATEDIFF(DAY, DateReported, #endDate) ELSE NULL END AS [GreaterThan4Days],
--CASE WHEN (DATEDIFF(DAY, DateReported, #endDate) > 5) AND (DATEDIFF(DAY, DateReported, #endDate) <= 6) THEN DATEDIFF(DAY, DateReported, #endDate) ELSE NULL END AS [GreaterThan5Days],
--CASE WHEN (DATEDIFF(DAY, DateReported, #endDate) > 6) AND (DATEDIFF(DAY, DateReported, #endDate) <= 7) THEN DATEDIFF(DAY, DateReported, #endDate) ELSE NULL END AS [GreaterThan6Days],
--CASE WHEN DATEDIFF(WEEK, DateReported, #endDate) > 1 THEN DATEDIFF(DAY, DateReported, #endDate) ELSE NULL END AS [GreaterThanWeek],
--DateReported,
--DateClosed,
--d.ProjectPath
FROM WorkItems wi
INNER JOIN ProjectDescendantsIncludingSelf d ON d.DescendantProjectID = wi.ProjectID
WHERE
DateReported < #endDate AND
(DateClosed IS NULL OR DateClosed > #endDate) AND
d.ProjectID = 182 AND
d.DescendantProjectID != 185
GROUP BY LessThanDay
)
SELECT [LessThanDayTicketCount] FROM OpenTicketsLessThanDay
GROUP BY LessThanDay
ORDER BY LessThanDay ASC

Answer 1

I presume you need something like one or the other of these.
DECLARE #EndDate datetime = getdate()
SELECT
COUNT(CASE WHEN modify_date > DATEADD(DAY,-1,#EndDate) THEN 1 END) AS [LessThanDay],
COUNT(CASE WHEN modify_date > DATEADD(DAY,-2,#EndDate) AND modify_date <= DATEADD(DAY,-1,#EndDate) THEN 1 END) AS [GreaterThan1Day],
COUNT(CASE WHEN modify_date > DATEADD(DAY,-3,#EndDate) AND modify_date <= DATEADD(DAY,-2,#EndDate) THEN 1 END) AS [GreaterThan2Days],
COUNT(CASE WHEN modify_date > DATEADD(DAY,-4,#EndDate) AND modify_date <= DATEADD(DAY,-3,#EndDate) THEN 1 END) AS [GreaterThan3Days],
COUNT(CASE WHEN modify_date > DATEADD(DAY,-5,#EndDate) AND modify_date <= DATEADD(DAY,-4,#EndDate) THEN 1 END) AS [GreaterThan4Days],
COUNT(CASE WHEN modify_date > DATEADD(DAY,-6,#EndDate) AND modify_date <= DATEADD(DAY,-5,#EndDate) THEN 1 END) AS [GreaterThan5Days],
COUNT(CASE WHEN modify_date > DATEADD(DAY,-7,#EndDate) AND modify_date <= DATEADD(DAY,-6,#EndDate) THEN 1 END) AS [GreaterThan6Days],
COUNT(CASE WHEN modify_date <= DATEADD(DAY,-7,#EndDate) THEN 1 END) AS [GreaterThanWeek]
FROM sys.objects
WHERE modify_date <= #EndDate
SELECT
COUNT(CASE WHEN DATEDIFF(DAY, modify_date, #EndDate) = 0 THEN 1 END) AS [LessThanDay],
COUNT(CASE WHEN DATEDIFF(DAY, modify_date, #EndDate) = 1 THEN 1 END) AS [GreaterThan1Day],
COUNT(CASE WHEN DATEDIFF(DAY, modify_date, #EndDate) = 2 THEN 1 END) AS [GreaterThan2Days],
COUNT(CASE WHEN DATEDIFF(DAY, modify_date, #EndDate) = 3 THEN 1 END) AS [GreaterThan3Days],
COUNT(CASE WHEN DATEDIFF(DAY, modify_date, #EndDate) = 4 THEN 1 END) AS [GreaterThan4Days],
COUNT(CASE WHEN DATEDIFF(DAY, modify_date, #EndDate) = 5 THEN 1 END) AS [GreaterThan5Days],
COUNT(CASE WHEN DATEDIFF(DAY, modify_date, #EndDate) = 6 THEN 1 END) AS [GreaterThan6Days],
COUNT(CASE WHEN DATEDIFF(DAY, modify_date, #EndDate) > 6 THEN 1 END) AS [GreaterThanWeek]
FROM sys.objects
WHERE modify_date <= #EndDate