Comparing date range quarters sql server

Posted by CR41G14 on Stack Overflow See other posts from Stack Overflow or by CR41G14
Published on 2012-10-25T10:53:36Z Indexed on 2012/10/25 11:00 UTC
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I have a policies in a system

PolRef       Start            End
POL123     22/11/2012      23/12/2014
POL212     24/09/2012      23/10/2012
POL214     23/08/2012      29/09/2012

I am asking a user for a reporting date, the user enters 24/10/2012 this becomes @StartDate

From this I derive what the quarter is by the month:

set @currentMonth = Month(@StartDate)

if @currentMonth = 1 or @currentMonth = 2 or @currentMonth = 3 begin set @startmonth = 1 set @endmonth = 3 end

if @currentMonth = 4 or @currentMonth = 5 or @currentMonth = 6 begin set @startmonth = 4 set @endmonth = 6 end

if @currentMonth = 7 or @currentMonth = 8 or @currentMonth = 9 begin set @startmonth = 7 set @endmonth = 9 end

if @currentMonth = 10 or @currentMonth = 11 or @currentMonth = 12 begin set @startmonth = 10 set @endmonth = 12 end

I then get a date range:

@quarterStartDate = CAST(CAST(YEAR(@StartDate) AS varchar) + '-' + CAST(@startMonth AS varchar) + '-' + '01') AS Date)

@quarterEndDate = CAST(CAST(YEAR(@EcdDate) AS varchar) + '-' + CAST(@endMonth AS varchar) + '-' + '31') AS Date)

This will give me 01-10-2012 and 31-12-2012. Basically I need a script to only bring back the policies that are in this quarter. The policy doesn't have to span the entire quarter date range, just exist in the quarter date range.

The results expected would be

PolRef       Start            End
POL123     22/11/2012      23/12/2014
POL212     24/09/2012      23/10/2012

Pol123 appears because it spans over the quarterly date range. Pol212 is there because it expires in that quarter date range. Pol214 does not appear because it neither spans, expires or starts in this quarter.

Any help would be greatly appreciated

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