SQL Care_Days

select  fiscal_yr,sum(care_days),sum(placement_moves)
 from base.placement_care_days_mobility 
where age_yrs_exit=-99 
and age_yrs_removal=-99 
and cd_race=0 
and county_cd=0 
and exclude_7day=0 
and exclude_trh=0 
group by fiscal_yr
 order by fiscal_yr


-- QA Placement_mobility (source table rptPlacement_Events)
 	select fy_start_date
	,sum(datediff(dd
	--begin_date
	,iif(  begin_date  < fy_start_date, fy_start_date, begin_date )
	-- end_date
	 , iif( 
		IIF(end_date > -- lessor of cutoff_date,18bday,discharge_date  
			iif(dbo.lessorDate( [18bday],rp.discharge_dt) > cutoff_date
					, cutoff_date
					,dbo.lessorDate( [18bday],rp.discharge_dt))
			-- use lessor of cutoff_date,18bday,discharge_date 
			, iif(dbo.lessorDate( [18bday],rp.discharge_dt) > cutoff_date
					, cutoff_date
					,dbo.lessorDate( [18bday],rp.discharge_dt))
			--else use end_date 
				,end_date)	> fy_stop_date
			-- use stop_date
			, fy_stop_date 
			-- else use derived end_date
				, (IIF(end_date > -- lessor of cutoff_date,18bday,discharge_date  
					iif(dbo.lessorDate( [18bday],rp.discharge_dt) > cutoff_date
						, cutoff_date
						,dbo.lessorDate( [18bday],rp.discharge_dt))
				-- use lessor of cutoff_date,18bday,discharge_date 
						, iif(dbo.lessorDate( [18bday],rp.discharge_dt) > cutoff_date
						, cutoff_date
						,dbo.lessorDate( [18bday],rp.discharge_dt))
				--else luse end_date 
				,end_date))   )))
            n_care_days
		,sum(iif(plcmnt_seq > 1 and begin_date between fy_start_date and fy_stop_date,1,0)) placement_moves
from  (select  distinct state_fiscal_yyyy sfy
							,min(calendar_date)  over (partition by state_fiscal_yyyy order by calendar_date)  fy_start_date
							,max(calendar_date)  over (partition by state_fiscal_yyyy order by calendar_date asc RANGE between current row and UNBOUNDED FOLLOWING)   fy_stop_date 
						from ca_ods.dbo.calendar_dim 
						where state_fiscal_yyyy between 2008 and 2013
				) cd
, ref_last_dw_transfer dw
, base.rptPlacement_Events rp
where removal_dt <=fy_stop_date
and (select min(rtrim(ltrim(replace(arrValue,char(39),'') )))
from dbo.fn_ReturnStrTableFromList(concat(char(39),
					convert(varchar(10),dw.cutoff_date,121) , ',' ,
					convert(varchar(10),rp.discharge_dt,121),',',
					convert(varchar(10),[18bday],121),char(39)),1))  >=fy_start_date
and begin_date <= fy_stop_date
and   (select min(rtrim(ltrim(replace(arrValue,char(39),''))) )
from dbo.fn_ReturnStrTableFromList(concat(char(39),
					convert(varchar(10),dw.cutoff_date,121) , ',' ,
					convert(varchar(10),rp.discharge_dt,121),',',
					convert(varchar(10),[18bday],121),',',
					convert(varchar(10),end_date,121),char(39)),1)) >=fy_start_date
and  rp.cd_epsd_type <> 5  
-- and placement begin date less than cutoff_date
and begin_date <= 
				 (select min(rtrim(ltrim(replace(arrValue,char(39),'') )))
					from dbo.fn_ReturnStrTableFromList(concat(char(39),
					convert(varchar(10),dw.cutoff_date,121) , ',' ,
					convert(varchar(10),rp.discharge_dt,121),',',
					convert(varchar(10),[18bday],121),char(39)),1))
group by fy_start_date
order by fy_start_date


-- coded originally by Gregor & Erik
-- define your start & stop period
  declare @care_day_start  date = '2007-02-05'
  declare @care_day_end    date = '2007-03-06'

--FROM rptPlacement
  SELECT @care_day_start,@care_day_end,sum(n_care_days)
  FROM(SELECT iif( removal_dt < @care_day_start , @care_day_start , removal_dt )  care_start
  , iif(isnull(discharge_dt, '9999-01-01') > @care_day_end , @care_day_end , discharge_dt) care_end
  , DATEDIFF(d
         , iif( removal_dt < @care_day_start, @care_day_start , removal_dt )
         , iif( isnull(discharge_dt, '9999-01-01') > @care_day_end , @care_day_end , discharge_dt )
           ) + 1 n_care_days
  FROM [CA_ODS].[base].[rptPlacement]
  WHERE removal_dt <= @care_day_end and isnull(discharge_dt, '9999-01-01') >= @care_day_start) AS test