How to apply Date condition for each month in 12 month period to my SQL query

Question

I am trying to retrieve all Outstanding Problem tickets in my Trendline SSRS report.
I need to pull the OpenDate <= Last day of last month And CloseDate >= 1st day of current month
for each month in the Last 12 months. How do I accomplish this in my query?
I must also need to pull the oustanding tickets for the next 11 months in the same query
where it will automatically pull the outstanding tickets for when a new month comes
in out of the 12 month period?
Here's a sample of my query to pull July 2013 Outstanding Problem tickets:
Select OpenDate, CloseDate, Ref_Num, Type, status
From Call_Req
Where OpenDate <= '2013-07-31 00:00:00' And CloseDate >= '2013-08-01 00:00:00'
And Type = 'P'
My Results:
OpenDate
CloseDate
Ref_Num
Type
status
6/13/2013 7:41
8/26/2013 12:41
P1726456FY13
P
CL
6/13/2013 8:17
8/23/2013 12:31
P1726612FY13
P
CL
6/13/2013 10:17
9/6/2013 16:54
P1727352FY13
P
CL
7/12/2013 10:46
9/6/2013 10:23
P1812568FY13
P
CL
7/18/2013 10:17
9/6/2013 8:53
P1830452FY13
P
CL
7/29/2013 15:54
9/6/2013 16:16
P1862906FY13
P
CL
5/17/2013 20:51
8/22/2013 9:09
P1653380FY13
P
CL
5/30/2013 13:29
8/26/2013 7:33
P1685693FY13
P
CL
7/15/2013 14:14
9/7/2013 9:42
P1818874FY13
P
CL
6/7/2013 15:49
9/6/2013 16:46
P1712265FY13
P
CL
7/18/2013 10:25
9/7/2013 9:18
P1830516FY13
P
CL
7/24/2013 16:30
8/12/2013 18:26
P1849909FY13
P
CL
Talitha Davis

Answer 1

Would this Work?
DECLARE @now DATE = GETDATE();
WITH months(lvl, daydate)
AS (
SELECT
1,
@now
UNION ALL
SELECT
lvl + 1,
DATEADD(MONTH, -1, daydate)
FROM months
WHERE lvl < 12
), dateranges(period, opendate, closedate)
AS (
SELECT
CAST(YEAR(daydate) AS CHAR(4))
+ '-'
+ RIGHT('0' + CAST(MONTH(daydate) AS varCHAR(2)), 2),
DATEADD(DAY, 0-DAY(daydate), daydate),
DATEADD(DAY, 1-DAY(daydate), daydate)
FROM months
SELECT
b.period,
a.OpenDate,
a.CloseDate,
a.Ref_Num,
a.Type,
a.status
From Call_Req a
INNER JOIN dateranges b
ON
a.OpenDate <= b.opendate
AND
a.CloseDate >= b.closedate
WHERE Type = 'P';
Microsoft Certified Trainer & MVP on SQL Server
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